 This is the simplest formulation of the theory. It becomes more complicated, however, when Fechner adds other claims to it. The most striking of these claims is that the mind and body are nothing but their appearances. The mind is nothing but its (actual and possible) appearances to itself; and the body is nothing but its (actual and possible) appearances to others. There is no mind in itself beyond how it appears to itself; and there is no body in itself, apart from and prior to how it appears to others. The theory then is a form of “neutral monism”, according to which there is one and the same kind of thing which has two aspects or attributes depending on how it is  viewed.[14]  This thing consists in only its appearances, whether internal or external.