A Standard From Above
Jesus ups the ante, the standard at which we are to live.
Introduction
The danger of anger.
5:21 Premeditated murder is prohibited by the sixth commandment (Ex. 20:13) and under OT law carried the death penalty (Num. 35:31). The prohibition is grounded in the fact that humans are created in the image of God (Gen. 1:26–27; 9:6). Concerning unpremeditated murder (manslaughter), see notes on Deut. 19:4–6 and 19:8–10.
The dangerous and destructive effect of human anger is likewise stressed throughout Scripture (e.g., Prov. 20:2; 22:3; 29:22; 2 Cor. 12:20; Gal. 5:20; Eph. 4:31; Col. 3:8; James 1:20). Anger typically entails a desire to damage or destroy the other person, either in some personal way or literally in the form of murder
The reward of being restored.
The one who initiates the reconciliation here is the one who has wronged the other person.