The truth of Nature is a part of the truth of God; to him who does not search it out, darkness; to him who does, infinity.

The first test of a truly great man is his humility. By humility I don't mean doubt of his powers or hesitation in speaking his opinion, but merely an understanding of the relationship of what he can say and what he can do.

All that is good in art is the expression of one soul talking to another, and is precious according to the greatness of the soul that utters it.

Quality is never an accident. It is always the result of intelligent effort.

Morality does not depend on religion.

To know anything well involves a profound sensation of ignorance.

There is hardly anything in the world that some man cannot make a little worse and sell a little cheaper, and the people who consider price only are this man's lawful prey.