I have investigated the dust-heaps of humanity, and found a treasure in all of them. I have found that humanity is not incidentally engaged, but eternally and systematically engaged, in throwing gold into the gutter and diamonds into the sea.
Verily, a polluted stream is man. One must actually be a sea to take in a polluted stream without becoming impure. Behold, I teach you the superman: he is the this sea, in him can your great contempt go under.
All the human and animal manure which the world wastes, if returned to the land, instead of being thrown into the sea, would suffice to nourish the world.
Poetry is sane because it floats easily in an infinite sea; reason seeks to cross the infinite sea and so make it finite. The result is mental exhaustion. To accept everything is an exercise, to understand everything a strain.