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

My mother was the making of me. She was so true and so sure of me, I felt that I had someone to live for - someone I must not disappoint. The memory of my mother will always be a blessing to me.

I am both pleased but astonished by the fact that mankind has not yet begun to use all the means and devices that are available for destruction. I hope that such weapons are never manufactured in quantity.

Results? Why, man, I have gotten lots of results! If I find 10,000 ways something won't work, I haven't failed. I am not discouraged, because every wrong attempt discarded is often a step forward.

When you become quiet, it just dawns on you

I owe my success to the fact that I never had a clock in my workroom.

The best thinking has been done in solitude. The worst has been done in turmoil.