Be ye angry, and sin not: let not the sun go down upon your wrath:
Be ye angry, and sin not. So the Septuagint (Psalms 4:4; see note on rigzuw (H7264) there, and Paul's application of it under the Spirit). Should circumstances call for anger on your part, let it be as Christ's (Mark 3:5), without sin. Natural feelings are not wrong when directed to their legitimate object, and not exceeding due bounds. As in the future literal, so in the present spiritual, resurrection, no essential constituent is removed, but only whatever is a perversion of the original design. Indignation at dishonour to God and wrong to man, as "lying" (Ephesians 4:25), is justifiable anger. Passion is sinful (derived from 'passio,' suffering: implying that amidst scheming energy, a man is really passive; the slave of anger, instead of ruling it).
Let not the sun go down upon your wrath - "wrath" is forbidden; "anger" not so, though, like poison used as medicine, it needs extreme caution. The sense is not, Your anger shall not be imputed if you put it away before nightfall; but 'Let no wrath (i:e. х parorgismos (G3950)], personal "irritation," "exasperation"), mingle with your "anger," however righteous' (Trench). 'Before sunset' (when the Jewish day began) is proverbial for 'put it away at once before another day begin' (Deuteronomy 24:15); also before you part for the night, perhaps never in this world to meet again. The Pythagoreans, if they had disputes, embraced one another before sunset. So John, 'Let not night and anger sleep with you, but conciliate the other party, though he have committed the offence.' Let not your 'anger' at another's wickedness verge to hatred.