Wood burns because it has the proper stuff in it; and a man becomes famous because he has the proper stuff in him.

When you take a man as he is, you make him worse. When you take a man as he can be, you make him better.

Oblivion is full of people who allow the opinions of others to overrule their belief in themselves.

Everything factual is, in a sense, theory. The blue of the sky exhibits the basic laws of chromatics. There is no sense in looking for something behind phenomena: they are theory.

Doubt can only be removed by action.

Men are joined by conviction, sundered by opinion.

What is the true test of character unless it be its progressive development in the bustle and turmoil, in the action and reaction of daily life.