Anger
She said, ‘”Let not the sun go down upon your wrath” (Ephesians 4:26). Likewise, if you wait until the sun is going down on your life, you will not know how to say, “Sufficient until the day is the evil thereof” (Matthew 6:34). Why do you hate the man who has harmed you? It is not he who has harmed you but the devil. You ought to hate the sickness, not the sick man.
-De vitis Patrum, Sive Verba Seniorum, Liber V