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.

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

When down in the mouth, remember Jonah. He came out all right.

I never pick up an item without thinking of how I might improve it. I never perfected an invention that I did not think about in terms of the service it might give others. I want to save and advance human life, not destroy it. I am proud of the fact that I never invented weapons to kill. The dove is my emblem.

There is much more opportunity than there are people to see it.

I never knew I had an inventive talent until Phrenology told me so. I was a stranger to myself until then!

The thing I lose patience with the most is the clock. Its hands move too fast