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Every man lives in two realms: the internal and the external. The internal is that realm of spiritual ends expressed in art, literature, morals, and religion. The external is that complex of devices, techniques, mechanisms, and instrumentalities by means of which we live.

Nature... is nothing but the inner voice of self-interest.

From the perspective of mere representation, the external world always remains only a phenomenon.

Nature is something outside our body, but the mind is within us.

Nature is inside art as its content, not outside as its model.

It can't be Nature, for it is not sense.

I've always internalized things.

That human behavior is more influenced by things outside of us than inside. The 'situation' is the external environment. The inner environment is genes, moral history, religious training.

Yes, I am well aware that nature - or what we call nature: that totality of objects and processes that surrounds us and that alternately creates us and devours us - is neither our accomplice nor our confidant.

What we achieve inwardly will change outer reality.