Laughter is the most inexpensive and most effective wonder drug. Laughter is a universal medicine.

Measures of sterilization should, in my opinion, be very definitely confined to persons who are mentally defective

The Axiom of Choice is necessary to select a set from an infinite number of socks, but not an infinite number of shoes.

Historically, it is quite doubtful whether Christ ever existed at all, and if He did we do not know anything about Him.

Science, by itself cannot, supply us with an ethic.

It is only through imagination that men become aware of what the world might be; without it, ‘progress’ would become mechanical and trivial.

No nation was ever so virtuous as each believes itself, and none was ever so wicked as each believes the other.