I don't believe in God but I'm very interested in her.

Many, and some of the most pressing, of our terrestrial problems can be solved only by going into space. Long before it was a vanishing commodity, the wilderness as the preservation of the world was proclaimed by Thoreau. In the new wilderness of the Solar System may lie the future preservation of mankind.

If children have interests, then education happens.

Some things have eternal value, and compassion is one of them. I hope we never lose that. Compassion for humans as well as animals.

Only feeble minds are paralyzed by facts.

They had not yet attained the stupefying boredom of omnipotence; their experiments did not always succeed.

The choice, as Wells once said, is the Universe-or nothing. . . . The challenge of the great spaces between the worlds is a stupendous one; but if we fail to meet it, the story of our race will be drawing to its close. Humanity will have turned its back upon the still untrodden heights and will be descending again the long slope that stretches, across a thousand million years of time, down to the shores of the primeval sea.