We have to get rid of those nuclear weapons.

There's life all over this universe, but the only life in the solar system is on earth, and in the whole universe we are the only men.

Dropping those atomic bombs on Hiroshima and Nagasaki was a war crime.

Civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind.

It would be a poor thing to be an atom in a universe without physicists, and physicists are made of atoms. A physicist is an atom's way of knowing about atoms.

A physicist is an atom's way of knowing about atoms.

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

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

I do not want to believe in God. Therefore I choose to believe in that which I know is scientifically impossible, spontaneous generation leading to evolution.

All War Departments are now Defense Departments. This is all part of the doubletalk of our time. The aggressor is always on the other side.

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

He who rules his spirit, shall conquer himself.

I love taking chances.

By diligence and patience, the mouse bit in two the cable.

When one admits that nothing is certain one must, I think, also admit that some things are much more nearly certain than others.

Travelers are fantasists, conjurers, seers - and what they finally discover is that every round object everywhere is a crystal ball: stone, teapot, the marvelous globe of the human eye.

Hope is the most important four-letter word in the language.

No, a euro referendum will not be part of a government programme if we get the chance to form one.

A tragedy need not have blood and death; it's enough that it all be filled with that majestic sadness that is the pleasure of tragedy.

Walking around an early spring garden- going nowhere.

We mustn't keep meeting like this. Communications between the people of the moon and earth is forbidden...it is the way of the gods...we mustn't fall in love...but its already too late.