We have no organ at all for knowledge, for truth: we know (or believe or imagine) precisely as much as may be useful in the interest of the human herd, the species: and even what is here called usefulness is in the end only a belief, something imagined and perhaps precisely that most fatal piece of stupidity by which we shall one day perish.

Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

Towering genius disdains a beaten path. It seeks regions hitherto unexplored.

Adversity is the midwife of genius.

After making a mistake or suffering a misfortune, the man of genius always gets back on his feet.

A genius is a talented person who does his homework.