Tis sometimes the height of wisdom to feign stupidity. — Cato the Elder. Roman politician, soldier and writer (234–149 BC)
I think the first virtue is to restrain the tongue; he approaches nearest to gods who knows how to be silent, even though he is in the right.
Wise men profit more from fools than fools from wise men; for the wise men shun the mistakes of fools, but fools do not imitate the successes of the wise.