CHAPTER XXII.
NATURE.
The word Nature has of course more meanings than one. I am going to use it here in the sense of the bare physical world, that region which forms the object of purely physical science, and appears to fall outside of all mind. Abstract from everything psychical, and then the remainder of existence will be Nature. It will be mere body or the extended, so far as that is not psychical, together with the properties immediately connected with or following from this extension. And we sometimes forget that this world, in the mental history of each of us, once had no existence. Whatever view we take with regard to the psychological origin of extension, the result will be the same. There was a time when the separation of the outer world, as a thing real apart from our feeling, had not even been begun. The physical world, whether it exists independently or not, is, for each of us, an abstraction from the entire reality. And the development of this reality, and of the division which we make in it, requires naturally some time. But I do not propose to discuss the subject further here.[1]
Then there comes a period when we all gain the idea of mere body. I do not mean that we always, or even habitually, regard the outer world as standing and persisting in divorce from all feeling. But, still, at least for certain purposes, we get the notion of such a world, consisting both of primary and also
