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.

Contrary to the ecologists, nature does not stand still and does not maintain the kind of equilibrium that guarantees the survival of any particular species - least of all the survival of her greatest and most fragile product: man.

To think is an act of choice. The key to what you so recklessly call ‘human nature,’ the open secret you live with, yet dread to name, is the fact that man is a being of volitional consciousness. Reason does not work automatically; thinking is not a mechanical process; the connections of logic are not made by instinct.

The anti-mind is the anti-life.

Man’s mind is his basic tool of survival. Life is given to him, survival is not. His body is given to him, its sustenance is not. His mind is given to him, its content is not. To remain alive, he must act, and before he can act he must know the nature and purpose of his action...To remain alive, he must think.