I am in exact accord with the belief of Thomas Edison that spirit is immortal, that there is a continuing center of character in each personality. But I don't know what spirit is, nor matter either. I suspect they are forms of the same thing. I never could see anything in this reputed antagonism between spirit and matter. To me this is the most beautiful, the most satisfactory from a scientific standpoint, the most logical theory of life.

If you think you can or cannot accomplish a task, you will be correct in either case.

If money is your hope for independence you will never have it

If I lose a billion dollars, I will have it back in less than five years.

The whole secret of a successful life is to find out what is one's destiny to do, and then do it.

Speculation is only a word covering the making of money out of the manipulation of prices, instead of supplying goods and services.

If you think you can do a thing or think you can't do a thing, you're right.