The source of this energy is the sun's radiation.

Research is four things: brains with which to think, eyes with which to see, machines with which to measure and, fourth, money.

Through the ages, man's main concern was life after death. Today, for the first time, we find we must ask questions about whether there will be life before death.

Research is not a systematic occupation but an intuitive artistic vocation.

A substance that makes you ill if you don't eat it.

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?