I never quit until I get what I want.

I've never made a mistake. I've only learned from experience.

I owe my success to the fact that I never had a clock in my workroom.

The three things that are most essential to achievement are common sense, hard work and stick-to-it-iv-ness.

I have never seen the slightest scientific proof of the religious ideas of heaven and hell, of future life for individuals, or of a personal God.

I am long on ideas, but short on time. I expect to live to be only about a hundred.

The injurious agent in cigarettes comes principally from the burning paper wrapper. The substance thereby formed is called "acrolein." It has a violent action on the nerve centers, producing degeneration of the cells of the brain, which is quite rapid among boys. Unlike most narcotics, this degeneration is permanent and uncontrollable. I employ no person who smokes cigarettes.