Before the current decade ends, fee-paying passengers will be experiencing suborbital flights aboard privately funded vehicles. . . . It won't be too long before bright young men and women set their eyes on careers in Earth orbit and say: "I want to work 200 kilometers from home-straight up!"

Magic's just science that we don't understand yet.

Our own grandchildren may demonstrate that-sometimes- Gigantic is Beautiful.

There's a passage about 'rivers of molten rock that wound their way... until they cooled and lay like twisted dragon-shapes vomited from the tormented earth.' That's a perfect description: how did Tolkien know, a quarter century before anyone ever saw a picture of Io? Talk about Nature imitating Art.

When one has to ask, "Am I really in love?" the answer is always "No".

The best proof that there's intelligent life in the universe is that it hasn't come here.

The universe must be full of voices, calling from star to star in a myriad tongues. One day we shall join that cosmic conversation.