A foolish man may be known by six things: Anger without cause, speech without profit, change without progress, inquiry without object, putting trust in a stranger, and mistaking foes for friends. (Arab Proverb) - More Arab Proverbs...
In the midst of great joy, do not promise anyone anything. In the midst of great anger, do not answer anyone 's letter. (Chinese Proverb) - More Chinese Proverbs...