II. The Mystery of the Head and That of the Lower Man

But that is not what he does. Instead, Friedrich Albert Lange says something else that, I would say, runs like a red thread through all the arguments in his book. He says: It is true that one can only assume the material world of atoms to be real. But if one assumes that, if one now goes and says that the material world of atoms is at work in space, arranged in hydrogen and nitrogen in such and such a way, interacting in such and such a way, if ideas are boiled down in the brain, and so on – if one assumes all this, then in the end it is also just a construct of concepts. So materialism, which one is forced to profess, is itself actually only idealism, because one is again only inventing the world of atoms.