A living cell requires energy not only for all its functions, but also for the maintenance of its structure.

Whatever a man does he must do first in his mind.

Here we stand in the middle of this new world with our primitive brain, attuned to the simple cave life, with terrific forces at our disposal, which we are clever enough to release, but whose consequences we cannot comprehend.

Life is water, dancing to the tune of solids.

Knowledge is a sacred cow, and my problem will be how we can milk her while keeping clear of her horns.

Science has helped us to understand and master ourselves, creating an elevated new form of human life, the wealth and beauty of which cannot be pictured today by the keenest imagination.

I always tried to live up to Leo Szilard's commandment, "don't lie if you don't have to." I had to. I filled up pages with words and plans I knew I would not follow. When I go home from my laboratory in the late afternoon, I often do not know what I am going to do the next day. I expect to think that up during the night. How could I tell them what I would do a year hence?