So the individual soul is only a portion of the collective soul of the group; it is the anonymous force at the basis of the cult, but incarnated in an individual whose personality it espouses; it is _mana_ individualized. Perhaps dreams aided in determining certain secondary characteristics of the idea. The inconsistency and instability of the images which fill our minds during sleep, and their remarkable aptitude for transforming themselves into one another, may have furnished the model for this subtile, transparent and Protean matter out of which the soul is believed to be made. Also, the facts of swooning, catalepsy, etc., may have suggested the idea that the soul was mobile, and quitted the body temporarily during this life; this, in its turn, has served to explain certain dreams. But all these experiences and observations could have had only a secondary and complimentary influence, whose very existence it is difficult to establish. All that is really essential in the idea comes from elsewhere.
But does not this genesis of the idea of the soul misunderstand its essential characteristic? If the soul is a particular form of the impersonal principle which is diffused in the group, the totemic species and all the things of every sort which are attached to these, at bottom it is impersonal itself. So, with differences only of degree, it should have the same properties as the force of which it is a special form, and particularly, the same diffusion, the same aptitude for spreading itself contagiously and the same ubiquity. But quite on the contrary, the soul is voluntarily represented as a concrete, definite being, wholly contained within itself and not communicable to others; it is made the basis of our personality.
But this way of conceiving the soul is the product of a late and philosophic elaboration. The popular representation, as it is spontaneously formed from common experience, is very different, especially at first. For the Australian, the soul is a very vague thing, undecided and wavering in form, and spread over the whole organism. Though it manifests itself especially at certain points, there are probably none from which it is totally absent. So it has a diffusion, a contagiousness and an omnipresence comparable to those of the _mana_. Like the mana, it is able to divide and duplicate itself infinitely, though remaining entire in each of its parts; it is from these divisions and duplications that the plurality of souls is derived. On the other hand, the doctrine of reincarnation, whose generality we have established, shows how many impersonal elements enter into the idea of the soul and how essential those are. For if the same soul is going to clothe a new personality in each generation, the individual forms in which it successively develops itself must all be equally external to it, and have nothing to do with its true nature. It is a sort of generic substance which individualizes itself only secondarily and superficially. Moreover, this conception of the soul is by no means completely gone. The cult of relics shows that for a host of believers even to-day, the soul of a saint, with all its essential powers, continues to adhere to his different bones; and this implies that he is believed to be able to diffuse himself, subdivide himself and incorporate himself in all sorts of different things simultaneously.