A book can never be anything more than the impression of its author’s thoughts. The value of these thoughts lies either in the matter about which he has thought, or in the form in which he develops his matter — that is to say, what he has thought about it.

It is only in the microscope that our life looks so big. It is an indivisible point, drawn out and magnified by the powerful lenses of Time and Space.

Sexual passion is the cause of war and the end of peace, the basis of what is serious... and consequently the concentration of all desire

Because Christian morality leaves animals out of account, they are at once outlawed in philosophical morals; they are mere 'things,' mere means to any ends whatsoever. They can therefore be used for vivisection, hunting, coursing, bullfights, and horse racing, and can be whipped to death as they struggle along with heavy carts of stone. Shame on such a morality that is worthy of pariahs, and that fails to recognize the eternal essence that exists in every living thing, and shines forth with inscrutable significance from all eyes that see the sun!

All the cruelty and torment of which the world is full is in fact merely the necessary result of the totality of the forms under which the will to live is objectified.

There is not a grain of dust, not an atom that can become nothing, yet man believes that death is the annhilation of his being.

It is most important to allow the brain the full measure of sleep which is required to restore it; for sleep is to a man's whole nature what winding up is to a clock.