The necessary consequence of man's right to life is his right to self-defense. In a civilized society, force may be used only in retaliation and only against those who initiate its use. All the reasons which make the initiation of physical force an evil, make the retaliatory use of physical force a moral imperative. If some "pacifist" society renounced the retaliatory use of force, it would be left helplessly at the mercy of the first thug who decided to be immoral. Such a society would achieve the opposite of its intention: instead of abolishing evil, it would encourage and reward it.

For the first time since her return, she felt pain, a violent pain, but it made her feel alive, because it was worth feeling.

Don't rely on our knowledge of what's best for your future. We do know, but it can't be best until you know it.

We'll meet again. We'll meet when years have passed, and years make such a difference, don't they?

Your emotional capacity is an empty motor, and your values are the fuel with which your mind fills it. If you choose a mix of contradictions, it will clog your motor, corrode your transmission and wreck you on your first attempt to move with a machine which you, the driver, have corrupted.

Racism is the lowest, most crudely primitive form of collectivism.

I think it's funny. There was a time when men were afraid that somebody would reveal some secret of theirs that was unknown to their fellows. Nowadays, they're afraid that somebody will name what everybody knows. Have you practical people ever thought that that's all it would take to blast your whole, big, complex structure, with all your laws and guns - just somebody naming the exact nature of what you're doing?