Matthew 5:21-47 is clearly designed to be read as a whole, consisting of six units of teaching each introduced by ‘You have heard that it was said … But I say to you …’, and rounded off with a summary of Jesus’ ethical demand in v. 48 (“So be perfect, just as your heavenly Father is perfect.”). It is neither a complete ethic, nor a theological statement of general ethical principles, but a series of varied examples of how Jesus’ principles, enunciated in vv. 17–20, work out in practice. And this practical outworking is set in explicit contrast with the ethical rules previously accepted. In each case it is more demanding, more far-reaching in its application, and more at variance with the ethics of man without God; The teachings concern a person’s motives and attitudes more than literal conformity to the rules. In this sense, it is quite radical.
The Introductory Phrasing
The formula with which Jesus’ demand is made is unvarying: “But I say to you.” The other side of the contrast varies from the full formula “You have heard that it was said to your ancestors” (vv. 21, 33) to the more abbreviated forms “You have heard that it was said” (vv. 27, 38, 43) and even simply “It was also said” (v. 31). But there is no discernible difference in intention: the full formula, once introduced in v. 21, does not need to be repeated in order to make the same point.
Two aspects of the wording of this formula are important. First, “it was said” represents a relatively rare passive form of the verb errethe, which is used in the NT specifically for quotations of Scripture or divine pronouncements. This means it is not likely that we can simply assume Jesus’ reference is the teaching of a group such as the Pharisees. The rare errethe points to a divine declaration. Secondly, this declaration was made to the ancestors; the reference cannot then be to any contemporary or recent tradition. These features suggest strongly that in the first half of each contrast we should expect to find a quotation of the Mosaic law, as it would be heard read in the synagogues.
This construction seems to imply that Jesus is setting his teaching in opposition to the divine law – as noted before Jesus claims not to abolish the law (v.17), insists that even the least of the commandments remains important (v.18) and that the community is to “obey and teach these commandments” (v.19). The intent of the construction may become clearer when we consider the peculiar nature of the “quotations” of the Law.
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