Serenity. Why lose your temper if by doing so you offend God, annoy other people, upset yourself... and have to find it again in the end? (The Way, 8)
Say what you have just said, but in a different tone, without anger, and your argument will gain in strength and, above all, you won't offend God. (The Way, 9)
Never correct anyone while you are still indignant about a fault committed. Wait until the next day, or even longer. And then, calmly, and with a purer intention, make your reprimand. You will gain more by one friendly word than …