Any foolish boy can stamp on a beetle, but all the professors in the world cannot make a beetle.

Indeed, intolerance is essential only to monotheism; an only God is by nature a jealous God who will not allow another to live. On the other hand, polytheistic gods are naturally tolerant, they live and let live.

It is only in the microscope that our life looks so big.

In action a great heart is the chief qualification. In work, a great head.

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.

Intellect is invisible to the man who has none.

A man can do what he wants, but not want what he wants.