True freedom is the right to say something that others don't want to hear. George Orwell
Wise men speak because they have something to say; Fools because they have to say something. Plato
Quickly, bring me a beaker of wine, so that I may wet my mind and say something clever. Aristophanes
Better to say nothing, than to say something not to the purpose. English Proverb
Be silent, or say something better than silence. German Proverb
Say nothing when you are giving -- only say something when you are receiving. Spanish Proverb