Nature teaches beasts to know their friends.

Sex is part of nature. I go along with nature.

What a book a devil's chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!

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

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

It is difficult to believe in the dreadful but quiet war lurking just below the serene facade of nature.