The truth about an animal is far more exciting and altogether more beautiful than all the myths woven about it.

I am convinced that of all the people on the two sides of the great curtain, the space pilots are the least likely to hate each other. Like the late Erich von Holst, I believe that the tremendous and otherwise not quite explicable public interest in space flight arises from the subconscious realization that it helps to preserve peace. May it continue to do so!

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.

The human soul is very much older than the human mind.

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.

It ought to be realized by all dog owners that obesity shortens a dog's life quite considerably, a life which is much too short anyhow.

A man sufficiently gifted with humor is in small danger of succumbing to flattering delusions about himself, because he cannot help perceiving what a pompous ass he would become if he did.