It is not so much that I have confidence in scientists being right, but that I have so much in nonscientists being wrong.

Any planet is 'Earth' to those that live on it.

Do not forget that a traitor within our ranks, known to us, can do more harm to the enemy than a loyal man can do good to us.

I figure that if God actually does exist, he is big enough to understand an honest difference of opinion.

A neat and orderly laboratory is unlikely. It is, after all, so much a place of false starts and multiple attempts.

To succeed, planning alone is insufficient. One must improvise as well.

When asked for advice by beginners. Know your ending, I say, or the river of your story may finally sink into the desert sands and never reach the sea.