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.

One of the first conditions of happiness is that the link between Man and Nature shall not be broken.

Nature is man's inorganic body - that is to say, nature insofar as it is not the human body. Man lives from nature - i.e., nature is his body - and he must maintain a continuing dialogue with it is he is not to die. To say that man's physical and mental life is linked to nature simply means that nature is linked to itself, for man is a part of nature.

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

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