The moderns do not realize modernity.

There is not really any courage at all in attacking hoary or antiquated things, any more than in offering to fight one's grandmother. The really courageous man is he who defies tyrannies young as the morning and superstitions fresh as the first flowers. The only true free-thinker is he whose intellect is as much free from the future as from the past.

There is nothing harder to learn than painting and nothing which most people take less trouble about learning.

Tolerance is the virtue of those who don't believe anything.

Never invoke the gods unless you really want them to appear. It annoys them very much.

Only friendliness produces friendship. And we must look far deeper into the soul of man for the thing that produces friendliness.

If men will not be governed by the Ten Commandments, they shall be governed by the ten thousand commandments