If an apple was magnified to the size of the Earth, then the atoms in the apple would be approximately the size of the original apple.

Scientific views end in awe and mystery, lost at the edge in uncertainty, but they appear to be so deep and so impressive that the theory that it is all arranged as a stage for God to watch man's struggle for good and evil seems inadequate.

When you get as old as I am, you start to realize that you've told most of the good stuff you know to other people anyway.

I find that teaching and the students keep life going, and I would never accept any position in which somebody has invented a happy situation for me where I don't have to teach. Never.

Fall in love with some activity, and do it! Nobody ever figures out what life is all about, and it doesn't matter.

The game I play is a very interesting one. It's imagination, in a tight straightjacket.

It appears that there are enormous differences of opinion as to the probability of a failure with loss of vehicle and of human life. The estimates range from roughly 1 in 100 to 1 in 100,000. The higher figures come from the working engineers, and the very low figures from management.