The art of teaching is the art of assisting discovery.
An unexamined idea, to paraphrase Socrates, is not worth having and a society whose ideas are never explored for possible error may eventually find its foundations insecure.
Wit is the only wall between us and the dark.
Bring ideas in and entertain them royally, for one of them may be the king.
Wisdom before experience is only words; wisdom after experience is of no avail.
There is no appeal from the ways of the world, which must continue on its own terms or take us all down with it into chaos and confusion.