Most teachers waste their time by asking questions which are intended to discover what a pupil does not know, whereas the true art of questioning has for its purpose to discover what the pupil knows or is capable of knowing.
He knows the universe, and himself he does not know.
What can I know? What ought I to do? What can I hope?
The main scourge of humanity is not ignorance, because the ignorant often have excuses, but the refusal to know.
