The Basis of Morality by Part 3 Chapter 3 Page 5

only indirectly, as simply the mental picture of the subject; whence it comes about that everything is invariably expressed in terms of self-consciousness.

The only world which the individual really grasps, and of which he has certain knowledge, he carries in himself, as a mirrored image fashioned by his brain; and he is, therefore, its centre. Consequently he is all in all to himself; and since he feels that he contains within his ego all that is real, nothing can be of greater importance to him than his own self. Moreover this supremely important self, this microcosm, to which the macrocosm stands in relation as its mere modification or accident, — this, which is the individual's whole world, he knows perfectly well must be destroyed by death; which is therefore for him equivalent to the destruction of all things.