The most pathetic person in the world is someone who has sight, but has no vision.

Space is not just going up and coming back down again. Space is getting into orbit and being there, living there, establishing a presence, a permanence.

To fly as fast as thought, you must begin by knowing that you have already arrived.

There's a lot of memorization that goes on in school. You memorize vocabulary words and all these sorts of things.

When we constantly ask for miracles, we're unraveling the fabric of the world. A world of continuous miracles would not be a world, it would be a cartoon.