“Definitions are the guardians of rationality, the first line of defense against the chaos of mental disintegration.”

“The only proper purpose of a government is to protect man's rights, which means: to protect him from physical violence. A proper government is only a policeman, acting as an agent of man's self-defense, and, as such, may resort to force only against those who start the use of force. The only proper functions of a government are: the police, to protect you from criminals; the army, to protect you from foreign invaders; and the courts, to protect your property and contracts from breaches or fraud by the others, to settle disputes by rational rules, according to objective law. But a government that initiates the employment of force against men who had forced no one, the employment of armed compulsion against disarmed victims, is a nightmare infernal machine designed to annihilate morality: such a government reverses its only moral purpose and switches from the role of protector to the role of man's deadliest enemy, from the role of of policeman to the role of a criminal vested with the right to the wielding of violence against the victims deprived of the right of self-defense. Such a government substitutes for morality the following rule of social conduct: you may do whatever you please to your neighbor, provided your gang is bigger than his.”

“Happiness is possible only to a rational man, the man who desires nothing but rational goals, seeks nothing but rational values and finds his joy in nothing but rational actions.”

“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.”

“Rationalization is a process of not perceiving reality, but of attempting to make reality fit one’s emotions.”

“Happiness is not to be achieved at the command of emotional whims. Happiness is not the satisfaction of whatever irrational wishes you might blindly attempt to indulge. Happiness is a state of non-contradictory joy—a joy without penalty or guilt, a joy that does not clash with any of your values and does not work for your own destruction, not the joy of escaping from your mind, but of using your mind's fullest power, not the joy of faking reality, but of achieving values that are real, not the joy of a drunkard, but of a producer. Happiness is possible only to a rational man, the man who desires nothing but rational goals, seeks nothing but rational values and finds his joy in nothing but rational actions.”

“Rationality is the recognition of the fact that nothing can alter the truth and nothing can take precedence over that act of perceiving it.”