The greatest discovery of the 20th Century is that our attitude of mind determines our quality of life, not circumstances.

The great use of life is to spend it for something that will outlast it.

Man, biologically considered ... is simply the most formidable of all beasts of prey, and, indeed, the only one that preys systematically on its own kind.

The strenuous life tastes better

It is your friends who make your world.

Just for today I will exercise my soul in three ways: I will do somebody a good turn and not get found out. I will do at least two things I don't want to do

I take it that no man is educated who has never dallied with the thought of suicide.