A lecture is much more of a dialogue than many of you probably realize.

The great questions are those an intelligent child asks and, getting no answers, stops asking.

We have to get rid of those nuclear weapons.

I have lived much of my life among molecules. They are good company.

I think if a physician wrote on a death certificate that old age was the cause of death, he'd be thrown out of the union. There is always some final event, some failure of an organ, some last attack of pneumonia, that finishes off a life. No one dies of old age.

We are living in a world in which all wars are wars of defense.

There was a golden period that I look back upon with great regret, in which the cheapest of experimental animals were medical students. Graduate students were even better. In the old days, if you offered a graduate student a thiamine-deficient diet, he gladly went on it, for that was the only way he could eat. Science is getting to be more and more difficult.