In man (as the only rational creature on earth) those natural capacities which are directed to the use of his reason are to be fully developed only in the race, not in the individual.

The science of mathematics presents the most brilliant example of how pure reason may successfully enlarge its domain without the aid of experience

Nature even in chaos cannot proceed otherwise than regularly and according to order.

No state at war with another state should engage in hostilities of such a kind as to render mutual confidence impossible when peace will have been made.

It is the Land of Truth (enchanted name!), surrounded by a wide and stormy ocean, the true home of illusion, where many a fog bank and ice, that soon melts away, tempt us to believe in new lands, while constantly deceiving the adventurous mariner with vain hopes, and involving him in adventures which he can never leave, yet never bring to an end.

Science is organized knowledge. Wisdom is organized life.

Art does not want the representation of a beautiful thing, but the representation of something beautiful.