Books are immortal sons deifying their sires.
And tell him it's quite true that the best of the philosophers are of no use to their fellows; but that he should blame, not the philosophers, but those who fail to make use of them.
No one ever teaches well who wants to teach, or governs well who wants to govern.
Philosophy begins in wonder.
The one who learns and learns and doesn't practice is like the one who plows and plows and never plants.
One cannot make a slave of a free person, for a free person is free even in a prison.