An angry man is always a stupid man.
Chinua Achebe (1930 – )
Nigerian novelist, poet, and essayist.
Anthills of the Savannah
Anger is a momentary madness, so control your passion or it will control you.
Horace (65 – 8 BC)
The man who gets angry at the right things and with the right people, and in the right way and at the right time and for the right length of time, is commended.
Aristotle (384 BC – 322 BC)