The human race may well become extinct before the end of the century. Speaking as a mathematician, I should say the odds are about three to one against survival.

True happiness for human beings is possible only to those who develop their godlike potentialities to the utmost.

Human nature being what it is, people will insist upon getting some pleasure out of life.

Neither the Church nor modern public opinion condemns petting, provided it stops short at a certain point.

Admit at least one painful truth to yourself every day. Teach yourself to feel that life would still be worth living even if you were not immeasurably superior to all your friends. Exercises of this sort, prolonged through several years, will at last enable you to admit facts without flinching, and will, in so doing, free you from the empire of fear over a very large field.

I've always thought respectable people scoundrels, and I look anxiously at my face every morning for signs of my becoming a scoundrel.

Education, which was at first made universal in order that all might be able to read and write, has been found capable of serving quite other purposes. By instilling nonsense it unifies populations and generates collective enthusiasm.