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

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

There is nothing worth having that can he obtained by nuclear war - nothing material or ideological - no tradition that it can defend. It is utterly self-defeating.

We are the products of editing, rather than of authorship.

The only use for an atomic bomb is to keep somebody else from using one. It can give us no protection - only the doubtful satisfaction of retaliation...

I think I know what is bothering the students. I think that what we are up against is a generation that is by no means sure that it has a future.

Our business is with life, not death.