Masturbation: the primary sexual activity of mankind. In the nineteenth century it was a disease; in the twentieth, it's a cure.

Boredom is the feeling that everything is a waste of time; serenity, that nothing is.

It is easier to do one's duty to others than to one's self. If you do your duty to others, you are considered reliable. If you do your duty to yourself, you are considered selfish.

Self-respect is to the soul as oxygen is to the body. Deprive a person of oxygen, and you kill his body; deprive him of self-respect and you kill his spirit.

Men love liberty because it protects them from control and humiliation by others, thus affording them the possibility of dignity; they loathe liberty because it throws them back on their own abilities and resources, thus confronting them with the possibility of insignificance.

Knowledge is gained by learning; trust by doubt; skill by practice; and love by love.

Whenever masses of people, especially educated people, know something - and when what they know is something they greatly fear because they believe it affects virtually everything they do or want to do - then most likely we stand in the presence of a vast falsehood.