Man's unique reward ... is that while animals survive by adjusting themselves to their background, man survives by adjusting his background to himself.

The question isn't who's going to let me; it's who's going to stop me.

Civilization is the progress toward a society of privacy. The savage's whole existence is public, ruled by the laws of his tribe. Civilization is the process of setting man free from men.

Every major horror of history was committed in the name of an altruistic motive. Has any act of selfishness ever equalled the carnage perpetrated by disciples of altruism?

Upper classes are a nations past; the middle class is its future.

Upper classes are a nation's past; the middle class is its future.

... to hold the body of women in our arms is ... the one ecstasy granted to the race of men.

We have come to see how great is the unexplored.

It is my eyes which see, and the sight of my eyes grants beauty to the earth.

It is not advisable ... to venture unsolicited opinions. You should spare yourself the embarrassing discovery of their exact value to your listener.