Man is the only animal which esteems itself rich in proportion to the number and voracity of its parasites.

Blushing is the most peculiar and most human of all expressions.

The great variability of all the external differences between the races of man, likewise indicates that they cannot be of much importance; for if important, they would long ago have been either fixed and preserved, or eliminated.

Worms have played a more important part in the history of the world than humans would at first suppose.

Man, wonderful man, must collapse, into nature's cauldron, he is no deity, he is no exception.

I do not need drugs to be a genius, do not take a genius to be human, but I need your smile to be happy.