2. Blood and Nerves
Thus, you see most modern sciences consist of thoughts about unrealities. Geology thinks of the earth as consisting purely of minerals. But there is no such purely mineral earth, just as the tree trunk as such does not exist. For the mineral kingdom of the earth already contains in itself plants, animals, and human beings, and only when we think of these latter kingdoms as connected with the mineral are we thinking about a reality. Geology, then, is a completely unreal science.
Read this passage in another edition
ENEnglish