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DISCOURSE 1: THE SERMON ON THE MOUNT
Matt 5:1-7:28

Introduction
The Disciple's Character: The Beatitudes (5:1-12)
The Disciple's Influence (5:13-16)
The Disciple's Righteousness (5:17-48)
    Antithesis one - Murder (5:21-26)
   
Antithesis two - Adultery (5:27-30)
    Antithesis three - Divorce (31-32)
    Antithesis four - Oaths (5:33-37)
    Antithesis five - Retaliation (5:38-42)
    Antithesis six - Loving Neighbor (5:43-48)

The Disciple's Piety (6:1-18)
The Disciple's Ambition (6:19-34)
The Disciple's Pitfalls (7:1-7:27)
The Formulae (7:28, 29)

Click on Structure to refer to the Structural Outline of Matthew.  



Introduction:
It is important to understanding The Sermon on the Mount that it be set in the context of the Theology of Matthew, and as a discourse that grows out of Narrative #1.

The Theology of Matthew is that Jesus is the Messiah, the King of God's Kingdom, that he does the works of the Messiah, and that he calls disciples to follow him and make disciples of all nations.

At the conclusion of Narrative #1, Jesus has called disciples to follow him.  In Matt 4:17 we have one of the key transitional passages (Kingsbury) in which the story of Jesus passes from the Period of Preparation for Ministry into the Public Ministry of Jesus.   Remember the formula at Matt 4:17, "from that time Jesus began to preach..."

The Sermon on the Mount picks up from the calling of the disciples and the teaches the called disciples what kind of person a disciple must be.  The Sermon develops the character of a disciple.  A key thought is that disciples are different in righteousness, piety, and ambition from the Scribes and Pharisees, and from the Gentiles.

The Sermon can be broken down into seven (7) sections:
      Matt 5:1-12    The Disciple's Character (The Beatitudes)
      Matt 5:13-16  The Disciple's Influence
      Matt 5:17-48  The Disciple's Righteousness:  To exceed that of the Scribes and Pharisees
      Matt 6:1-18    The Disciple's Piety:   Deeds of Righteousness
      Matt 6:19-34  The Disciple's Ambition
      Matt 7:1-27    The Disciple's Pitfalls
      Matt 7:28-29  The Formulae



5:13-16 The Disciple's Influence: Salt and Light. 
Two points are made here by Jesus regarding the influence that disciples have. 
Notice, Jesus did not say that disciples should be like salt and light, he said they are salt and light!
Disciples are expected to be an influence on those with whom they come into contact.

With the reference to salt, Jesus picks up a common metaphor.  Everyone would know about salt and its unique characteristics!
Jesus' beginning comment, "You are..." is expressed via the emphatic form of you.
Whether Jesus is drawing on the preservative nature, the seasoning nature, or the purifying nature of salt is impossible to determine.  It is best that we include all aspects of salt!
The salt that looses its saltness must be a reference to the impure salt drawn from the Dead Sea which contained other minerals.  Normally, salt does not loose its saltness, but the common salt of Jesus' day and context may well have been known for this characteristic.
Whatever the case, salt that does not do what salt should do is worthy of being discarded.

The reference to light is however, intriguing, for it is a common metaphor of Scripture to refer to God as light.
Isa 60:19,20 "but the Lord will be your everlasting light..."
1 John 1:5, "God id light..."
John 8:12, "I am the light of the world..."

Light as opposed to darkness illustrated the radical difference between God and evil.
Light also had a salvific aspect in that certain things were brought into the light.  Paul could speak of the light of the glorious gospel..." (2 Cor 4:4).

Disciples are to reflect the light of God and of his kingdom to those in darkness.
The references to God's people reflecting his light are numerous.
Israel was to be a light to the Gentiles (Isa 49:6)
The Qumran Community referred to themselves as "sons of light.."
The people who walked in  darkness were to see a great light (Isa 9:2)
Jesus was the light of the world; his disciples must reflect that light.

The imperatival form of Let your light shine adds to the urgency of this encouragement.
Although Jesus will warn the disciples in the following section (Mat 6:1ff) not to make a show of their piety (good works reflecting their relationship with God) he encourages them to use their lives as light to the world reflecting the light of Jesus and the Gospel.  Disciples are not to make a display of their good example and influence, but to remember that their good life and influence do make and must make a difference. 

The result of lives used properly to reflect the light of the kingdom will result in praise and glory being given to God.

Matthew uses the expression "your Father  who is in heaven."
In fact, the fatherhood of God is a dominant theme in Matthew's Gospel.
Matthew uses this expression Father, or one similar to it, repeatedly in his Gospel, possible at least 45 times.
Jesus refers to God as Father 17 times in the Sermon on the Mount.
The use of this term introduces the interesting fact that the kingdom of God is also about a special new relationship with God.  He is our Father!
Father in heaven is a distinctly Matthean term, found outside of Matthew only once in Mark.

The major point in the use of Father in the Sermon is that the disciple experiences a new relationship with God.


Matt 5:17- 48  The Disciples Righteousness:  To exceed that of the Scribes and Pharisees
The major thrust of this pericope is that the disciple's righteousness must exceed that of the Scribes and Pharisees.
It also stresses that the disciple's righteousness must be the right kind of righteousness!

Paul in his Epistles to Romans and Galatians (as well as elsewhere) will argue that the disciple's righteousness is not gained by law keeping, but by grace through faith in Jesus..
However, Jesus' purpose at this point, unlike Paul, is not how one becomes righteous, but rather the clarification of the nature of righteousness.

In Jesus' day, the Scribes and Pharisees held that righteousness could only be possible if one kept all of the minutia of the law as taught by the Jewish system and tradition of the Scribes and Pharisees.
Jesus began by stressing that his purpose was not to destroy the Law, but to establish its real purpose.
In doing this, it became necessary for Jesus to address the Scribes and Pharisees attitude toward law.  This he does in Six striking Antitheses (Opposite conceptions).

Jesus then addressed Jewish attitudes toward, and understandings of the purpose of the Law.  
He began by stressing that had not come to destroy the law, but to fulfill the law. 

The remainder of the pericope is Jesus addressing, in the Six Antitheses, the Scribal and Pharisaical attitudes toward the law that he found faulty.
The problem was that the Scribes and Pharisees had the wrong attitude toward, and understanding of the law.  
Jesus was concerned that the attitude of the disciple should not be like that of the Scribes and Pharisees, but should address deeper matters, or root issues, for which the law was intended, but which the Scribes and Pharisees missed.

We must begin by thinking of the Law as a Jew would think of the Law!  For Jesus as a Jew speaking to Jews, and Matthew was a Jew, writing to Jewish Christians.  We should, therefore, approach this pericope with a Jewish sensitivity and understanding of the Law.

First, Law as Torah.
The English word law derives from the Greek and Septuagint translation of the Hebrew word, Torah, as
nomos (nomos - law, principle).
The English word "law", and the Greek word nomos simply do not do justice to the Hebrew concept of Torah.  Law translates only a part of what is understood by the Jew in Torah.
We recommend that the student explore Torah in a good Bible Dictionary such as The Interpreter's Dictionary of the Bible, or preferably, The Anchor Bible Dictionary.  (Click here on Torah to go to the Glossary of Terms.)

The Law and the Prophets.
This pericope is fascinating (and difficult) in that it contains several parallel statements which are intended to reinforce Jesus claim.
His primary claim is that he did not come to destroy the law, for the law is the instruction of God!
He reinforces this claim with several parallel statements.

Notice the parallel statements:

5:17 Think not that I have come to abolish the law... (kataluw - kataluo - destroy)
I have not come to abolish them but to fulfill them (
kataluw - kataluo destroy)
5:17
5:18
to fulfill them (plhrow - pleroo - to fulfill)
all is accomplished  (
ginomai - ginomai - happen, fulfill)
5:18
till heaven and earth pass away (ews - heos - until)
until all is accomplished (
ews - heos - until)

In 5:17, Jesus began by stressing that his purpose was not to abolish (kataluw - kataluo, destroy, abolish, repeal) the law and the prophets, but to fulfill them.  Since the discussion later on the Six Antitheses (5:21-48) has to do primarily with the Mosaic law, we can here assume that Jesus includes here the law (Torah) as seen in the Pentateuch.  However, since Jesus adds to this and the Prophets, he also includes Torah in the broader sense.  It is interesting that Jesus would specify the law and the prophets rather than merely the law!  He obviously intended to include the full understanding of Torah.

Jesus had no intention of destroying any of the Torah!

This saying of Jesus is vitally important to his ministry, and also that of Matthew.  It is so vital that Jesus repeats the saying twice in a parallel form.  Jesus is stressing that he upholds the full Torah, correctly understood.
Notice above that in the construction that Jesus (Matthew) sets to abolish in opposite parallelism against to fulfill .

But what exactly does Jesus mean by fulfill?  The word fulfill (plhrow - pleroo) can involve several thoughts including to accomplish, to complete, to finish, to bring to an end, to validate, to confirm, to establish, to uphold the law, or to bring out the intended meaning of the law.
Hagner is possibly correct in concluding that Jesus came to bring the law to its intended purpose or meaning.  In other words, Jesus came to bring to the law its proper focus, that is, its rightful role in right relations with God.   He came to bring to light the divinely intended and theological meaning and purpose of the law.

To emphasize his conviction that he had no intention of destroying the law, Jesus adds that "heaven and earth would pass away" before he removed on jot or dot from the law.  To reinforce his claim he adds (5:18) "until all is accomplished," that is, "until the law is understood in its proper role."  The point here again is that he has no intention of destroying the law!

The jot is a translation of iwta - iota (iota, the letter "i" in English and the smallest letter in the Greek alphabet, iota is the equivalent of the yod, one of the smallest letters the Hebrew alphabet).  The word dot is translated from the Greek keraia - keraia - which is one of the minute markings of a written text.  The point again of this somewhat Semitic idiom is that Jesus had not intention of destroying the law!

The fascinating saying of Jesus in 5:17,18 contains two ews (heos - till, until) clauses, "till heaven and earth pass away..." and "until all is accomplished."  
The expression "is accomplished" derives from
genhtai (ginomai - ginomai meaning to come into existence, to occur, to take place, to be established, to be finished, to be completed) and is similar, or parallel to fulfill in 5:17.
The two clauses introduced by the same
ews are intended to be parallel clauses, the second clause expanding on the first.
The first expression "till heaven and earth pass away" means "before the end of time or the age or world." 
The second expression "until all is accomplished" means until the correct meaning of the law is explained, understood, fulfilled.
We should be aware that these two clauses of 5:18 are merely a Semitic idiomatic way of explaining that Jesus had no intention whatsoever of destroying the law!

5:19 simply adds to Jesus point!  The kingdom of heaven is all about the correct instruction of God!  Whoever relaxes even the least of the commandments of God's instruction is least, or not deserving of the kingdom or reign of God!  The commandments (entolh - entole - command) in this context must have reference to the Mosaic law, but not as interpreted by the scribes and Pharisees, but as interpreted by Jesus.  By contrast, he who properly understands the commandments and keeps them is great in the kingdom.

5:20 is the clinching statement, or what this pericope is all about.  It is possibly the key and pivotal statement to what follows in the Six Antitheses that follow, and in Jesus understanding of righteousness.

For I tell you, unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.

Jesus comes to his point:  Kingdom righteousness is different from that of the established Scribes and Pharisees.
John. R. W. Stott in his work The Sermon on the Mount, describes what he feels is the key to the Sermon.  It is simple!  Disciples are different!

Jesus does not deny that the Scribes and Pharisees do not have a form of righteousness!  However, he stresses that their righteousness is not adequate for kingdom righteousness!
The point Jesus makes is this:  The disciple's righteousness must exceed that of the Scribes and Pahrisees.
The Scribes and Pharisees, we will learn from Matthew, make a show of their righteousness!  Apparently, they do it to be seen by men (Mat 6:1). 

It is imperative at this stage of the study that we investigate the Jewish understanding of righteousness, or, the biblical  understanding of righteousness.

Matthew's Understanding of Righteousness.
We can also express this in terms of Jewish and Biblical understanding of righteousness meaning the correct Jewish understanding of righteousness as we learn of it from Jesus, Matthew, and Paul.  However, our focus in this study is on Matthew's use of the term righteousness.

We must extend a word of caution here!  The study of the topic, righteousness, is an extensive study.  For example, the article on righteousness in The Anchor Bible Dictionary covers 50 pages, and includes 2 1/2 pages of bibliography!  It soon becomes obvious to the careful student that the subject of righteousness covers an number of theological concerns, and historically in the Old and New Testaments manifests a considerable growth in understanding and application.  What makes the study challenging is the fact that the root words in both the OT (Hebrew MT text - sdq, sadeq, and the Septuagint - dik - dikaiosunh - dikaiosune) and the NT (dik - dikaiosunh - dikaiosune ) are translated in a number of different ways, depending on context.  The meanings of these terms are broad.  For example, acquittal, deliverance, honest, integrity, judgment, justice, prosperity, right, righteous, righteous deeds, salvation, victory, vindication, et al! 

Several good works address the topic of righteousness, mostly as it relates to the Christian understanding of the topic:

The Anchor Bible Dictionary 
Barth, M. Justification: Pauline Texts Interpreted in the Light of the Old and New Testaments, 1971.
Dunn, J. D. G. "Righteousness from the Law," Tradition and Interpretation in the New Testament, 1988.
Fitzmyer, J. A. Romans
Sanders, E. P. Jesus and Judaism, 1985.
Sanders, E. P. Paul and Palestinian Judaism, 1977.
Sanders, E. P. Paul, the Law, and the Jewish People, 1983.
Davies, W. D. Paul and Rabbinic Judaism, 1948.
Hagner, Donald A. Matthew 1-8, 1993.
Hill, David. The Gospel of Matthew, 1972.

Although he word righteousness is not often found in Matthew (it is used in Matthew seven times), the concept of righteousness is fundamental to Jesus' and Matthew's teaching.  For Jesus and Matthew, Kingdom understanding is understanding righteousness!  The use of the term righteousness in Matthew extends from a right relationship with God, to right conduct in view of that relationship with God, to an attitude of commitment to the will of God.
We will find that Matthew uses the concept of righteousness in a variety of nuances, all related to the right relationship to God.
We can summarize Matthew's use of righteousness then as, 1) the right relationship to God and his will, 2) the right conduct that flows from that relationship to God.

In the Sermon on the Mount (here at 5:20, but also at 6:1, and 6:33) the point Jesus makes is that the disciple's behavior that flows from the disciple's relationship with God must be deeper and more extensive than that of the Scribes and Pharisees, whose concept of righteousness was limited to superficial deeds (minutiae) in accordance with their interpretations of the Torah.  Kingdom righteousness is different from that of the Scribes and Pharisees.  In the Six Antitheses, and the remainder of the Sermon, Jesus will demonstrate what he means.

Unless the disciple's righteousness exceeds that of the Scribes and Pharisees, they will have no part in God's kingdom.

The Six Antitheses (5:21-6:48)
The six antitheses that follow Jesus' instruction on righteousness contrast Jesus' understanding of the true meaning of the Torah with the common Rabbinic understanding of the Torah.
The radical sound of Jesus' teaching in the antitheses does not amount to an annulment of the Torah (5:17), but a true explanation and fulfillment of its intended meaning.  Jesus was correcting Rabbinic understanding and use of the Torah, but at the same time explaining the depth of the righteous attitude toward God's Torah, and the radical nature of discipleship in the kingdom.


5:21-26

Antithesis One - The Sixth Commandment - "You shall not kill..."
The expression "you have heard that it was said..." is repeated in five of the antitheses, and is included in similar form in the third antithesis.
The use of this phrase was a typical Rabbinic device by which the Rabbis demurred from pitting their views against Scripture, or even readily commenting on Scripture.  It was their custom to refer back to the teachings and conclusions of previous Rabbis with the expression, "you have heard that it was said..., contrasting their views with the Rabbinic tradition rather than Scripture.  The corpus of Rabbinic tradition in the Halakah and Haggadah was a much safer pool for thought, discussion, and debate!  
Jesus, in good Rabbinic style, sets his teaching against the Rabbinic tradition with the traditional Rabbinic saying "you have heard that it was said...", but then draws his conclusions from Scripture, correcting the Rabbinic tradition.
Jesus' teaching, therefore, carried a much stronger Scriptural authority than the Rabbinic tradition ands style.  It is no wonder that at the end of the Sermon on the Mount, "the crowd were astonished, for he taught them as one who had authority" (Mat 7:29).

"You have heard that it was said..." as a repeated Rabbinic formulae means "you have received the rabbinic tradition..."

"You have heard that it was said to the men of old..." probably refers back to the Mosaic period when the law was given.

The Rabbinic teaching "You shall not kill; and whosoever kills shall be liable to judgment" in Jesus' mind missed the meaning and purpose of the sixth commandment (Ex 20:13).  The quotation of the commandment is precisely as stated in Ex 20:13 and Deut 5:18, the concluding comment re judgment is a Rabbinic interpretation of the commandment.  It is difficult to determine with any certainty what was meant in the Rabbinic tradition by judgment.  Most likely they meant the judgment of the Sanhedrin. 

In Jesus' response we three enlargements on the Rabbinic tradition, each introduced by the statement "is liable to...", which picks up the expression from the Rabbinic saying "is liable to judgment."  The construction in Jesus saying may provide some indication of what Jesus meant in his three "judgment" statements.  Note the parallelism in Jesus' three judgment statements:

everyone who is angry with his brother  is liable to judgment
whoever insults his brother (Raka - similar to idiot) is liable to the council (Sanhedrin)
whoever says "You fool" (Mwros - moros -  our moron) is liable to the hell of fire

Notice the increase of intensity from angry, to insult (Raka - an objectionable social insult), to You fool (Moron).

A question of interest is whether the three corresponding expressions of judgments are in an increasing order from judgment through the council to the hell of fire or whether they are three somewhat synonymous expressions of judgment.

The Rabbinic expression in all probability had reference to the judgment and death penalty of the Jewish Sanhedrin, for that is all they would have understood by this.  If we move from that Jewish understanding, and we should remember that Jesus and Matthew were speaking to Jews, then we should begin interpreting Jesus' teaching from within that Jewish context.

In the Jewish court system, there would be a range of courts as in our present day court system ranging from local county courts to state courts through state supreme courts to the national supreme court.
The Jewish system would have a local Sanhedrin comprised of 23 male members, and then the Jerusalem Sanhedrin comprised of 71 male members.  Cases would move from the local to the Jerusalem Sanhedrin.

The hell of fire (literally the Gehenna of fire) certainly has eschatological (final end of the world) judgment overtones.  Gehenna derives from the Valley of Hinnon which lay just outside the city to the South.  This was a "smelly, smoky" place where the city refuse was burned.  In earlier pagan days it had been the place of human sacrifice.  Gehenna  became a suitable Jewish metaphor for the final judgment.
Whatever the structure, whether a crescendo or merely synonymous judgments, they certainly go far beyond the Rabbinic teaching which tied murder (kill in the commandments meant murder) to the death sentence.

Jesus went right to the heart of murder, namely anger that is permitted to grow to insult and finally into open denigration which often lies at the heart of murder.

The strict adherence to the sixth and other commandments was admirable, but feel short of the divine intent of the commandments.  
Note Mat 22:36-40 where Jesus observes that to love God and one's neighbor is the sum of the commandments, and Mat 19:16-22 where Jesus tells the rich young man that there is more to eternal life than merely keeping the letter of the commandments.

Jesus is teaching that there is more to the sixth commandment than mere murder!

The next verses (23-26) regarding making things right with your brother before taking an offering to the altar of sacrifice drives home the point that God wants more than mere sacrifice.  He wants love, mercy, and righteousness.  This reinforces the point that Jesus is making.  Love comes before the strict literal performance of the commandments.  This does not diminish the need to respect and keep the commandments.  It does, however, demand the correct understanding of the meaning of the commandments. 

5:27-30 Antithesis Two - The Seventh Commandment - "You shall not commit adultery "
The quotation  of the seventh commandment is verbatim from Ex 20:14, and Deut 5:18.
The word for adultery here is
moiceuw - moicheuo, the normal word for the breaking of the marriage covenant in extramarital sexual intercourse.  (See porneia and moicheia below under the third antithesis.)
Like the previous teaching of Jesus on murder, this teaching goes straight to the heart of the commandment, not the mere commission of the act, but the inner thought and being of the person.
Jesus teaching  in the antithesis "But I say to you that every one who looks at a woman lustfully..." goes right to the heart of the sin, the lust of the eye and mind, the desiring or imagining a sexual relationship.  This lustful desire of the eye and heart in Jesus mind is the same as committing adultery, only this adultery is in the heart, which is perhaps more serious than the act itself for it speaks of the heart of man rather than merely the actions of the man.
The plucking out the offending right eye and right hand is a Hebrew idiom or hyperbole stressing the seriousness of the action or offense.
This antithesis on adultery leads straight into the third antithesis on divorce.

5:31-32  Antithesis Three - "Whoever divorces his wife..."
Unlike the previous two antitheses, this one is not based on one of the commandments, but arises out of the command against adultery.  Jesus will again comment on divorce  in Mat 19:3-12 where he is tested by the Pharisees on Deut 24.  the debate on Deut 24 was obviously one that engaged the Scribes and Pharisees considerably.

Although Jesus comments briefly on divorce and remarriage in this pericope, he does so because of the previous discussion on adultery.  Jesus does not get involved in a lengthy discussion on divorce, but uses the occasion to address the problem of divorce.  The proximity of this teaching to adultery leads one to believe that adultery and divorce both arise in the lustful heart of men.  Whatever Jesus says about divorce and remarriage must be seen in the context of what he has most recently been discussing, that is, adultery.

The current "saying" on divorce was that all a man had to do was to give his wife a certificate of divorce in accordance with Moses' instruction (Deut 24).  Jesus' response challenges the superficiality of the current practice.

In the current discussion among the Rabbis on divorce and remarriage in Jesus day two opinions held sway, that of Rabbi Hillel and that of Rabbi Shammai.  Rabbi Hillel interpreted Deut 24 loosely so that divorce was granted for any case of uncleanness.  Rabbi Shammai interpreted Deut 24 narrowly to where divorce was granted only in cases of unchastity, or sexual uncleanness. 

Again, as in the case of the previous two antitheses, Jesus takes the "high" or more difficult road that challenges the inner heart of man rather than the superficial nature of man.  Jesus teaches that it divorce according to Moses involved only unchastity (porneia, porneia - sexual sin or any kind of sexual aberration).

Jesus' argument hinges on the understanding of two Greek words, porneia, porneia - sexual aberration, and moicheia, moicheia - adultery.  This is an appropriate time for a brief discussion on these two words and how they were used in Jesus day, and especially among the Jews.

Porneia:
As indicated above, the word refers to any kind of sexual aberration, but often to extramarital sexual intercourse.  The word in its normal sense refers to fornication and adultery, that is, any kind of extra marital or pre marital intercourse.  Although moicheia is the normal term used for adultery, porneia is a broader term and can also be used for adultery.  In Mat 5:32 porneia involves a married person engaged in extra marital sexual intercourse other wise no written certificate of divorce would be required and the problem being addressed would not exist!

Moicheia:
Moicheia (and its cognate words) is the word normally translated adultery, and is the word used when a married person commits either porneia (extramarital or intermarital sexual intercourse).  Moicheia suggests the breaking of a marriage vow in porneia (extra or inter marital sexual intercourse).

Some modern scholars (mostly Roman Catholic) have suggested that porneia as used here in Mat 5:32 refers to incestuous marriage or marriage within the forbidden laws of Jewish marriage (Lev 18:6-18).  This interpretation has not gained wide or popular acceptance.  Interestingly, porneia is not used in the Septuagint of Lev 17-18!

Jesus does not engage here in the Hillel-Shammai debate with the Scribes and Pharisees, but when he is tested over this problem in Mat 19:3-9 takes the narrower view of Shammai.  In this third antithesis Jesus takes the narrower view of divorce indicating that kingdom ethics on the matter of marriage and divorce are different from the laissez-faire ethic of much of the current attitude of his day.  More is expected of disciples in Jesus' radical view of discipleship in the kingdom than is manifest in the practice of the day (it was also said...).  In Mat 19:10, Jesus' attitude is so narrow that even the disciples have problems with it!

5:33-37  Antithesis Four - "You shall not swear falsely..."
This antithesis is introduced by the normal formulae, "You have heard that it was said..."  In this case Jesus is not taking issue with how the Scribes and Pharisees treated a commandment, but rather against the lax Rabbinic casuistry in the treatment of oaths.  Jesus is addressing a crystallization of several teachings in the Torah (Lev 19:12; Num 30:2; Deut 23:21-23; and possibly Ex 20:7).  Swearing by heaven, the temple, earth, the footstool of God, Jerusalem, or one's head were typical examples of how Rabbinic casuistry shifted the oath to a lesser one which was not as binding as an oath sworn before God.  Jesus taught that kingdom ethics demanded absolute integrity rather than the easy way out offered by lesser oaths.  Kingdom ethics demanded that the disciple's word be binding regardless of an oath.  Jesus was not teaching against oaths taken, but against the attitude that lesser oaths were not binding.  Nor was Jesus teaching against taking oaths, since Jesus took and oath (Mat 26:63 "I adjure you..."), God swore by his promise and his person (Lk 1:73; Acts 2:30; Heb 6:16-18).  Rather than taking an oath and not keeping it, or attempting to circumnavigate the keeping of oaths by taking lesser oaths, James (in the context of the same Rabbinic practice) encourages disciples not to take oaths if they are not going to keep them (Jas 5:12).

5:38-42 Antithesis Five - "An eye for an eye..." 
Rabbinic practice in response to the law that permitted recompense for loss (Ex 21:24 ""eye for eye, tooth for tooth"; Lev 24:20; Deut 19:21) permitted equal recompense for loss by one's neighbor.  Jesus understanding of these laws was that they were intended to restrict excessive retaliation rather than empower retaliation!  We refer to these Mosaic laws as the  lex talionis, the law of retaliation.
In broad sweeping terms Jesus teaches that kingdom ethics elicits no retaliation at all!  
Jesus' antithesis sets his kingdom expectation against the Rabbinic legal practice which misunderstood the intention of the lex talionis which was originally intended to restrict excessive retaliation.  A legalistic response to personal loss was not what the lex talionis was intended to accomplish, and Jesus' teaching runs in opposition to the then current practice and normal human reactions.
Illustrating the extent of kingdom ethics, Jesus encourages the disciples when taken to court over ones coat (inner garment) to surrender one's cloak (outer garment) as well!

5:43-48 Antithesis Six - "You shall love your neighbor and hate your enemy..."
"You shall love your neighbor..." is drawn directly from Lev 19:18, and later Jesus will teach that this is the second commandment of import.  The second part of Rabbinic teaching, "and hate your enemy...", is not commanded or taught directly, but may be a summary drawn form such passages as Ps 139:21-22; 26:5; or Deut 7:2; and 30:7.  Following centuries of aggression against Israel's enemies in the occupation of Canaan and Palestine, it is natural that Jews would see hating one's as a legitimate attitude.  At about the same time as Jesus' ministry the Qumran community taught hatred of enemies as a legitimate practice (1GS 1:4, 10-11; 9:21-26).

Jesus' response was a radical antithesis to current Jewish attitude toward enemies, and the Jews had many enemies among the Roman occupation armies!  In contrast to hating, Jesus teaches love for one's enemies, and prayers for those persecuting the disciple.  Since persecution was to be a major part of discipleship for several centuries, this teaching would be a critical aspect of future kingdom ethics and behavior.  Such kingdom ethics would be proof of sonship of God, for God loves the enemies (Jn 3:16, "For God so loved the world that he gave his only son...").  Righteousness in the kingdom includes a call to be like the Father!

Loving only one's friends was the practice of sinners (tax collectors) and the Gentile ethic, and was not to be the practice of those who strove to be perfect (teleios - teleios - having reached one's goal, mature) as God was perfectTeleios was used in the Septuagint for the Hebrew term tamim, which was often used in contexts of ethical righteousness, which by implication would mean maturity in ethical righteousness.

Christian love for one's neighbor is a sign of spiritual and ethical maturity, of being mature in love like God.

Loving one's neighbor and blessing those who persecute the disciple became a fundamental teaching of the early church (Rom12:14; 1 Cor 4:12; 1 Pet 3:9), and should remain so today!  Because to do so is characteristic of God and his Son, Jesus.