Besides the evolutionist’s reason that it is absurd to attribute consciousness and personality to tunicate mollusks there is another reason drawn from human introspection for asserting elementary feelings to be absolute and unrelated existence. “A feeling, at the instance when it _exists_, exists _an und für sich_ and not as _my_ feeling.”[41] The self-perception of the ego, the sense that in all my various feelings it is _I_ who am conscious, this “unity of apperception” does not exist in the instantaneous consciousness which it unites, but only in subsequent reflection upon it. It consists further in the power of establishing a certain connexion between the memories of any two feelings which we had at the same instant. There is one other point of extreme importance to be noticed in Clifford’s account of the elementary feelings or ejects. They are connected together in their sequence and coexistence by counterparts of the physical laws of matter. Were it not so their correspondence with motions of matter could not be kept up. That they should be thus connected with one another militates at first sight with the characteristic of absoluteness above ascribed to them by Clifford. We must suppose therefore that when Clifford says that their existence is not relative to anything else, he means no more than that they are not ultimately related to a personal consciousness. We must suppose that it is these laws of the sequence and coexistence of elementary feelings which, “when molecules are so combined together as to form the film on the under side of a jelly-fish, so combine the elements of mind-stuff which go along with them as to form the faint beginnings of sentience. The same laws combine feelings so as to form some kind of consciousness, when the molecules are so combined as to form the brain and nervous system of a vertebrate” (p. 85). We are now after these preliminary explanations in a position to appreciate what is the gist and core of Clifford’s speculations. It is this, that the reality external to our minds which is represented in our minds as matter is in itself mind-stuff or elementary feelings. The universe consists entirely of mind-stuff. Some of this is woven into the complex form of human minds containing imperfect representations of the mind-stuff outside them and of themselves also, as a mirror reflects its own image in another mirror, _ad infinitum_. Such an imperfect representation is called a material universe. The two chief points therefore of the doctrine as summed up by Clifford himself are: 1) Matter is a mental picture in which mind-stuff is the thing represented. 2) Reason, intelligence, and volition are properties of a complex which is made up of elements themselves not rational, not intelligent, not conscious.