For the sole true end of education is simply this: to teach men how to learn for themselves; and whatever instruction fails to do this is effort spent in vain.

The only Christian work is good work, well done

Sex is every man's loco spot ... he'll take a disappointment, but not a humiliation.

Have you noticed that the astronomers and mathematicians are much the most cheerful people of the lot? I suppose that perpetually contemplating things on so vast a scale makes them feel either that it doesn't matter a hoot anyway, or that anything so large and elaborate must have some sense in it somewhere.

We shall know what things are of overmastering importance when they have overmastered us.

But if it ever occurs to people to value the honor of the mind equally with the honor of the body, we shall get a social revolution of a quite unparalleled sort — and very different from the kind that is being made at the moment.

I have never yet heard any middle-aged man or woman who worked with his or her brains express any regret for the passing of youth.