To be natural means to dare to be as immoral as Nature is.

After nature had drawn a few breaths, the star cooled and congealed, and the clever beasts had to die. One might invent such a fable, and yet he still would not have adequately illustrated how miserable, how shadowy and transient, how aimless and arbitrary the human intellect looks within nature.

Man selects only for his own good: Nature only for that of the being which she tends.

Nature does not complete things. She is chaotic. Man must finish, and he does so by making a garden and building a wall.

I do not see why man should not be just as cruel as nature.

There is no result in nature without a cause; understand the cause and you will have no need of the experiment.