"The wrath of man does not accomplish the righteousness of God."(Jas 1:20)
When the holy and illustrious patriarch Joseph sent back his brethren from Egypt to his father’s house, he gave them this sole advice: “Be not angry in the way” (Gn 45:24). I say the same to you: this wretched life is but a journey to the happy life to come. Let us not be angry with one another on the way, but rather let us march on with the band of our brethren and companions, meekly, peaceably, and lovingly. I say to you, absolutely and without exception, do not be angry at all, if it be possible. Admit no pretext whatsoever to open the gate of your heart to anger, for St. James tells us positively and without reservation: "The wrath of man does not accomplish the righteousness of God."(1:20)
We must indeed, constantly and courageously, but with meekness and compassion, resist evil and restrain the vices of those that are under our charge… We do not set so much value to the correction which proceeds from passion, even though it be accompanied with reason, as to that which proceeds from reason alone... If it can but once gain the night on us and if “the sun sets on our anger” (Eph 4:26), it turns into a hatred from which we have scarce any means to rid ourselves. It nourishes itself under a thousand false pretexts, for there was never an angry man that thought his anger unjust.
It is better, then, to attempt to find the way to live without anger, than to pretend to make a moderate and discreet use of it. When we find ourselves surprised into anger through our imperfections and frailty, it is better to drive it away speedily than to enter into a discussion with it.