If anything is possible, then nothing is interesting

The professional military mind is by necessity an inferior and unimaginative mind; no man of high intellectual quality would willingly imprison his gifts in such a calling.

Adapt or perish, now as ever, is nature's inexorable imperative.

In all the round world of Utopia there is no meat. There used to be, but now we cannot stand the thought of slaughterhouses. And it is impossible to find anyone who will hew a dead ox or pig. I can still remember as a boy the rejoicings over the closing of the last slaughterhouse.

Nature never appeals to intelligence until habit and instinct are useless. There is no intelligence where there is no need of change.

It is the going out from oneself that is love and not the accident of its return. It is the expedition, whether it fail or succeed.

Very much indeed of what we call moral education is such an artificial modification and perversion of instinct; pugnacity is trained into courageous self-sacrifice, and suppressed sexuality into religious emotion.