It is not a sentimental, but a grimly literal fact that unless we share this terrestrial globe with creatures other than ourselves, we shall not be able to live on it for long.

Whenever man forgets that man is an animal, the result is always to make him less humane.

It is not ignorance but knowledge which is the mother of wonder.

If we are deprived of hope as well as fear, we are compensated by being given an almost endless patience for enduring or simply for waiting.

An abundance of some good things is perfectly compatible with the scarcity of others; that life is everywhere precarious, man everywhere small.

Nature takes no account of even the most reasonable of human excuses.

February... Now more than ever one must remind oneself that it is wasteful folly to wish that time would pass, or - as the puritanical old saying used to have it - to kill time until it kills you.