George Leo Haydock

Be angry, and sin not, as it is said Psalm iv. 5. Anger, as a passion of the mind, may proceed from a good motive and be guided by reason; as our Saviour, Christ, (Mark iii. 5.) is said to have looked about at the Jews with anger, i.e. with a zeal against their blindness and malice. — Let not the sun go down upon your anger. If moved to anger, return without delay to a calmness of mind and temper. (Witham) — Be angry when reason or necessity compels you; but even then, so restrain your anger that you neither offend God nor scandalize your neighbour. Moreover, lay it aside as soon as you are able, so that the sun go not down upon your anger. (Jansenius)