I would be very ashamed of my civilization if we did not try to find out if there is life in outer space.

We are the custodians of life's meaning.

The nuclear arms race is like two sworn enemies standing waist deep in gasoline, one with three matches, the other with five.

In the deepest sense the search for extraterrestrial intelligence is a search for ourselves.

Extinction is the rule. Survival is the exception.

In more than one respect, the exploring of the Solar System and homesteading other worlds constitutes the beginning, much more than the end, of history.

If you look at Earth from space you see a dot, that's here. That's home. That's us. It underscores the responsibility to deal more kindly and compassionately with one another and to preserve and cherish that pale blue dot, the only home we've ever known.