What a man's mind can create, man's character can control.

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

I never did anything worth doing entirely by accident. . . Almost none of my inventions came about totally by accident. They were achieved by having trained myself to endure and tolerate hard work.

The biggest failure of man is that he gives up before he realizes how close he was to success.

Success is the product of the severest kind of mental and physical application.

Because I readily absorb ideas from every source - frequently starting where the last person left off - I never pick up an item without thinking of how I might improve it.

An average American loves his family. If he has any love left over for some other person, he generally selects Mark Twain.