History's just one darn thing after another.

To do more for the world than the world does for you - that is success.

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.

Whatever you resist will persist.

Thinking is hard work. That's why there are so few people doing it.

Before everything else, getting ready is the secret of success.

Luck and destiny are the excuses of the world's failures.