"If any one is angry with you, meet his anger by returning benefits for it: a quarrel which is only taken up on one side falls to the ground: it takes two men to fight."
Lucius Annaeus Seneca
(4 B.C.-A.D. 65) Roman Stoic philosopher, statesman, dramatist, "Seneca the Younger"
Moral Essays, De Ira (On Anger): Book 2, cap. 34, line 5.