A man who is 'of sound mind' is one who keeps the inner madman under lock and key.

Whoever wants to accomplish great things must devote to a lot of profound thought to details.

Growing nations should remember that, in nature, no tree, though placed in the best conditions of light, soil, and plot, can continue to grow and spread indefinitely.

Long years must pass before the truths we have made for ourselves become our very flesh.

A man's true secrets are more secret to himself than they are to others.

Great things are accomplished by those who do not feel the impotence of man. This is a precious gift.

We must always apologize for talking painting.