Philosophy is the self-correction by consciousness of its own initial excess of subjectivity.

Art flourishes where there is a sense of adventure.

The ideas of Freud were popularized by people who only imperfectly understood them, who were incapable of the great effort required to grasp them in their relationship to larger truths, and who therefore assigned to them a prominence out of all proportion to their true importance.

Great dreamers' dreams are never fulfilled, they are always transcended.

Human life is driven forward by its dim apprehension of notions too general for its existing language.

The pursuit of mathematics is a divine madness of the human spirit.

No man of science wants merely to know. He acquires knowledge to appease his passion for discovery. He does not discover in order to know, he knows in order to discover.