I began to make inquiries of the hundreds of successful men who collaborated with me in the organization of the science of success, and discovered that each of them had received guidance from unknown sources, although many of them were reluctant to admit this discovery.

Nothing is more tragic - or more common - than mental inertia.

The world is ruled, and the destiny of civilization is established, by the human emotions.

Failure cannot cope with persistence.

Success in its highest and noblest form calls for peace of mind and enjoyment and happiness which come only to the man who has found the work that he likes best.

You are the sum total of your dominating or most prominent thoughts.

Education comes from within; you get it by struggle and effort and thought.