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

Every creature alive on the earth today represents an unbroken line of life that stretches back to the first primitive organism to appear on this planet; and that is about three billion years.

A scientist lives with all reality. There is nothing better. To know reality is to accept it, and eventually to love it.

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

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

A scientist should be the happiest of men. Not that science isn't serious; but as everyone knows, being serious is one way of being happy, just as being gay is one way of being unhappy.