When it looks at great accomplishments, the world, bent on simplifying its images, likes best to look at the dramatic, picturesquemoments experienced by its heroes.... But the no less creative years of preparation remain in the shadow.

All my life I have been passionately interested in monomaniacs of any kind, people carried away by a single idea. The more one limits oneself, the closer one is to the infinite; these people, as unworldly as they seem, burrow like termites into their own particular material to construct, in miniature, a strange and utterly individual image of the world.

Only the rare expands our minds, only as we shudder in the face of a new force do our feelings increase. Therefore the extraordinary is always the measure of all greatness. And the creative element always remains the value superior to all others and the mind superior to our minds.

It is a law of life that human beings, even the geniuses among them, do not pride themselves on their actual achievements but thatthey want to impress others, want to be admired and respected because of things of much lower import and value.

Decisive inventions and discoveries always are initiated by an intellectual or moral stimulus as their actual motivating force, but, usually, the final impetus to human action is given by material impulses ... merchants stood as a driving force behind the heroes of the age of discovery; this first heroic impulse to conquer the world emanated from very mortal forces

There is no sense to a sacrifice after you come to feel that it is a sacrifice.

But, in history, practical usefulness never determines the moral value of an achievement. Only the person who increases the knowledge humanity has about itself and enhances its creative consciousness permanently enriches humanity.