It is the nature of the self to manifest itself In every atom slumbers the might of the self.

There is a very remarkable inclination in human nature to bestow on external objects the same emotions which it observes in itself and to find every where those ideas which are most present to it.

Man is a creative retrospection of nature upon itself.

Stupidity is something unshakable nothing attacks it without breaking itself against it it is of the nature of granite hard and resistant.

Our behavior toward each other is the strangest most unpredictable and most unaccountable of all the phenomena with which we are obliged to live. In all of nature there is nothing so threatening to humanity as humanity itself.

What we observe is not nature itself but nature exposed to our method of questioning.

Poetry is the universal language which the heart holds with nature and itself. He who has a contempt for poetry cannot have much respect for himself or for anything else.

Human society sustains itself by transforming nature into garbage.

Our body is a machine for living. It is organized for that it is its nature. Let life go on in it unhindered and let it defend itself.

Habit is a second nature that destroys the first. But what is nature? Why is habit not natural? I am very much afraid that nature itself is only a first habit just as habit is a second nature.