A good idea is never lost. Even though its originator or possessor may die, it will someday be reborn in the mind of another.

Vision without execution is delusion.

Youth doesn't take advice.

I have had a lot of success with failure

The three great essentials to achieve anything worth while are: Hard work, Stick-to-itiveness, and Common sense.

X-rays ... I am afraid of them. I stopped experimenting with them two years ago, when I came near to losing my eyesight and Dally, my assistant practically lost the use of both of his arms.

I have not failed. I have successfully discovered 1200 ideas that don't work.