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.

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

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

Why is thought being a secretion of brain, more wonderful than gravity a property of matter? It is our arrogance, our admiration of ourselves.

Man in his arrogance thinks himself a great work.

It may be doubted whether any character can be named which is distinctive of a race and is constant.