"Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter. Explore the world. Nearly everything is really interesting if you go into it deeply e…"

"I have a theory that the universe is a great big safe, and that there's a combination to open it. But the combination is locked up in the safe."

"For a successful technology, reality must take precedence over public relations, for nature cannot be fooled."

"I would rather have a world with five billion people that didn't know how to read than a world with five billion people that all knew how to read and all thought the same thing."

"I'm not a deep thinker. I'm a practical thinker."