My happiness is not the means to any end. It is the end. It is its own goal. It is its own purpose.

The three of them set out every morning on adventures of their own kind. Once, an elderly professor of literature, Mrs. Taggart's friend, saw them on top of a pile in a junk yard, dismantling the carcass of an automobile. He stopped, shook his head and said to Francisco, 'A young man of your position ought to spend his time in libraries, absorbing the culture of the world.' 'What do you think I'm doing?' asked Francisco.

So you think that money is the root of all evil? [...] Have you ever asked what is the root of money? Money is a tool of exchange, which can't exist unless there are goods produced and men able to produce them. Money is the material shape of the principle that men who wish to deal with one another must deal by trade and give value for value. Money is not the tool of the moochers, who claim your product by tears, or of the looters, who take it from you by force. Money is made possible only by the men who produce. Is this what you consider evil?

A man of independent judgment is a man of profound self-esteem.

Are my characters copies of people in real life? ... Don't ever believe the stories about authors putting people into novels. That idea is a kind of joke on both authors and readers. All the readers believe that authors do it. All the authors know that it can't be done.

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.

The purpose of the law is not to prevent a future offense, but to punish the one actually committed.