"No, you do not have to live as a man; it is an act of moral choice. But you cannot live as anything else—and the alternative is that state of living death which you now see within you and around you, the state of a thing unfit for existence, no longer human and less than animal, a thing that knows nothing but pain and drags itself through its span of years in the agony of unthinking self-destruction."

"Whatever the degree of your knowledge, these two—existence and consciousness—are axioms you cannot escape, these two are the irreducible primaries implied in any action you undertake, in any part of your knowledge and in its sum, from the first ray of light you perceive at the start of your life to the widest erudition you might acquire at its end."

"Reason is your means of survival — so that for you, who are a human being, the question ‘to be or not to be’ is the question 'to think or not to think..'."

"Man has the power to act as his own destroyer—and that is the way he has acted through most of his history."

"Man’s life, as required by his nature, is not the life of a mindless brute, of a looting thug or a mooching mystic, but the life of a thinking being—not life by means of force or fraud, but life by means of achievement—not survival at any price, since there’s only one price that pays for man’s survival: reason."

"Man’s life is the standard of morality, but your own life is its purpose . If existence on earth is your goal, you must choose your actions and values by the standard of that which is proper to man—for the purpose of preserving, fulfilling and enjoying the irreplaceable value which is your life."

"To exist is to be something, as distinguished from the nothing of non-existence, it is to be an entity of a specific nature made of specific attributes."

"In the many months of his absence, she never wondered whether he was true to her or not; she knew he was. She knew, even though she was too young to know the reason, that indiscriminate desire and unselective indulgence were possible only to those who regarded sex and themselves as evil."

"When men reject reason, they have no means left for dealing with one another — except brute, physical force."

"There is no difference between the principles, policies and practical results of socialism—and those of any historical or prehistorical tyranny. Socialism is merely democratic absolute monarchy—that is, a system of absolutism without a fixed head, open to seizure of power by all corners, by any ruthless climber, opportunist, adventurer, demagogue or thug."