Of the 200 light bulbs that didn't work, every failure told me something that I was able to incorporate into the next attempt.

Life's most soothing things are a child's goodnight and sweet music.

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.

In creating technology for ourselves we created it for the world.

Education isn't play--and it can't be made to look like play. It is hard, hard work. But it can be made interesting work.

Every wrong attempt discarded is another step forward

Five percent of the people think; ten percent of the people think they think; and the other eighty-five percent would rather die than think.