As our own species is in the process of proving, one cannot have superior science and inferior morals. The combination is unstable and self-destroying.

I have a fantasy where Ted Turner is elected President but refuses because he doesn't want to give up power.

A faith that cannot survive collision with the truth is not worth many regrets.

Across the gulf of centuries, the blind smile of Homer is turned upon our age. Along the echoing corridors of time, the roar of the rockets merges now with the creak of the wind-taut rigging. For somewhere in the world today, still unconscious of his destiny, walks the boy who will be the first Odysseus of the Age of Space.

Any smoothly functioning technology will have the appearance of magic.

No utopia can ever give satisfaction to everyone, all the time. As their material conditions improve, men raise their sights and become discontented with power and possessions that once would have seemed beyond their wildest dreams. And even when the external world has granted all it can, there still remain the searchings of the mind and the longings of the heart.

Once you can reproduce a phenomenon, you are well on the way to understanding it.