It anger lasts too long, it may become hatred. Anger inflames the eye, but hatred blinds it. If love is life, hatred is death. Perhaps you ran into people who were furious with you. What lasting harm could they do you? In their rage they threaten to kill the body, but by hating them you have killed the soul. They have killed the body of another in anger; in hating them you have killed your own soul.

—Augustine, Commentary on Psalm 54