Genius is its own reward; for the best that one is, one must necessarily be for oneself. . . . Further, genius consists in the working of the free intellect., and as a consequence the productions of genius serve no useful purpose. The work of genius may be music, philosophy, painting, or poetry; it is nothing for use or profit. To be useless and unprofitable is one of the characteristics of genius; it is their patent of nobility.

Genius is an intellect that has become unfaithful to its destiny.

The fly ought to be used as the symbol of impertinence and audacity; for whilst all other animals shun man more than anything else, and run away even before he comes near them, the fly lights upon his very nose.

That which knows all things and is known by none is the subject.

Physics is unable to stand on its own feet, but needs a metaphysics on which to support itself, whatever fine airs it may assume towards the latter.

They tell us that suicide is the greatest piece of cowardice... that suicide is wrong; when it is quite obvious that there is nothing in the world to which every man has a more unassailable title than to his own life and person.

the brut first knows death when it dies, but man draws consciously nearer to it every hour that he lives; and this makes his life at times a questionable good even to him who has not recognised this character of constant anaihilation in the whole of life.