"In the amoral world of Diplomacy, however, they are the hallmarks of the born loser. If a fallen enemy reaches out a hand for assistance, the wise man lops it off. If a friend does you a good turn when you’re down, wait until he’s down, then beat him to death. If an ally asks for your help in planning the next season’s moves, give it freely and copiously, then do the reverse of what you agreed and let him take the counter-attack. Try to surround yourself with people who trust you, then let them down; find an ally who will gladly die for you and see that he does just that."
January 1, 1970
https://en.wikiquote.org/wiki/Diplomacy_(game)