From the outer edge of his life, looking back, there was only one remorse, and that was only that he wished to go on living.

What's the point of having a library full of books you've already read?

(in response to the question: what do you think of e-books and Amazon’s Kindle?) Those aren’t books. You can’t hold a computer in your hand like you can a book. A computer does not smell. There are two perfumes to a book. If a book is new, it smells great. If a book is old, it smells even better. It smells like ancient Egypt. A book has got to smell. You have to hold it in your hands and pray to it. You put it in your pocket and you walk with it. And it stays with you forever. But the computer doesn’t do that for you. I’m sorry.

They are so confident that they will run on forever. But they won't run on. They don't know that this is all one huge big blazing meteor that makes a pretty fire in space, but that some day it'll have to hit.

Facts quite often, I fear to confess, like lawyers, put me to sleep at noon. Not theories, however. Theories are invigorating and tonic. Give me an ounce of fact and I will produce you a ton of theory by tea this afternoon. That is, after all, my job.

We are all . . . children of this universe. Not just Earth, or Mars, or this system, but the whole grand fireworks. And if we are interested in Mars at all, it is only because we wonder over our past and worry terribly about our possible future.

Comic strips introduced me to metaphors. They are pure metaphor, so you learn how to tell a story with symbols, which is a very valuable thing to learn. And I learned that from motion pictures, too, and from poetry. Poetry is mainly metaphor. If it doesn't have a metaphor, it doesn't work.