Knowledge is power but only wisdom is liberty.

Underneath all civilization, ancient or modern, moved and still moves a sea of magic, superstition, and sorcery. Perhaps they will remain when the works of our reason have passed away.

I feel for all faiths the warm sympathy of one who has come to learn that even the trust in reason is a precarious faith, and that we are all fragments of darkness groping for the sun. I know no more about the ultimates than the simplest urchin in the streets.

Sixty years ago I knew everything. Now I know nothing. Education is a progressive discovery of our own ignorance.

If you wish to be loved, be modest; if you wish to be admired, be proud; if you wish both, combine external modesty with internal pride.

Christianity did not destroy paganism; it adopted it.

Man became free when he recognized that he was subject to law.