USE EVERY EFFORT TO SOOTHE AND TRANQUILIZE your principal; do not see things in the same aggravated light in which he views them; extenuate the conduct of his adversary whenever you see clearly an opportunity to do so, without doing violence to your friend’s irritated mind. Endeavor to persuade him that there must have been some misunderstanding in the matter. Check him if he uses opprobrious epithet towards his adversary, and never permit improper or insulting words in the note you carry.
—The Code Duello