This verse summarizes all of Jesus' teaching about the Old Testament's demands (vv. 21-47). "Therefore"identifies a conclusion.
"Perfect"(Gr. teleios) often occurs in a relative sense in the New Testament, and translators sometimes render it "mature"(e.g., 1 Cor. 14:20; Eph. 4:13; Heb. 5:14; 6:1). However it also means perfect. In this context it refers to perfect regarding conformity to God's requirements, which Jesus just clarified. He wanted His disciples to press on to perfect righteousness, a goal that no sinful human can attain but toward which all should move (cf. v. 3; 6:12). They should not view righteousness as simply external, as the scribes and Pharisees did, but they should pursue inner moral purity and love. This is only appropriate since their heavenly Father is indeed perfect.
"Perfection here refers to uprightness and sincerity of character with the thought of maturity in godliness or attaining the goal of conformity to the character of God. While sinless perfection is impossible, godliness, in its biblical concept, is attainable."298
Good children in the ancient East imitated their fathers. Jesus advocated the same of His disciples. In giving this summary command Jesus was alluding to Leviticus 19:2, which He modified slightly in view of Deuteronomy 18:13.
"In Jesus' perspective, the debates concerning law and tradition are all to be resolved by the proper application of one basic principle, or better, of a single attitude of the heart, namely, utter devotion to God and radical love of the neighbor (5:48; 22:37-40)."299
While we are to strive for perfection in our conformity to the will of God (cf. 1 Pet. 1:15-16), we must beware of the perils associated with perfectionism. Striving for an unattainable goal is difficult for anyone, but it is particularly frustrating for people with obsessive compulsive personalities, people who tend to be perfectionistic. In one sense a perfectionist is someone who strives for perfection, but in another sense it is someone who is obsessed with perfection. Such a person, for example, constantly cleans up his or her environment, straightens things that are not exactly straight, and corrects people for even minor mistakes. This type of striving for perfection is not godly. God does is not constantly "on the backs"of people who are less than perfect, and we should not be, either other people or ourselves. In fact, He gives us a great deal of "space"and is patient with us, allowing us to correct our own mistakes before He steps in to do so. It is possible for disciples of Jesus to become so obsessed with our own holiness that we shift our focus from Christ to ourselves. Rather we should keep our eyes on Him (Heb. 12:1-3) more than on ourselves and being perfect.
