“A man can learn wisdom even from a foe”
“It takes a wise man to learn wisdom from a wise woman!”
“Learned we may be with another man's learning: we can only be wise with wisdom of our own.”
“To make no mistakes is not in the power of man; but from their errors and mistakes the wise and good learn wisdom for the future.”
“It is from their foes, not their friends, that cities learn the lesson of building high walls”
“The greatest foe of human is his mighty wisdom.”