I tell my students to try early in life to find an unattainable objective.

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

Nuclear weapons offer us nothing but a balance of terror, and a balance of terror is still terror.

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.

It's not good enough to give it tender, loving care, to supply it with breakfast foods, to buy it expensive educations. Those things don't mean anything unless this generation has a future. And we're not sure that it does.

When you have no experience of pain, it is rather hard to experience joy.

The only point of government is to safeguard and foster life.