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

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

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

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.

Nature knows no indecencies; man invents them.

Nature is always hinting at us. It hints over and over again. And suddenly we take the hint.