PROPOSITION L.

Every Spiritual Substance is the intrinsic constitutive principle of its Individuation by its own actual Entity.

It would be useless to expend elaborate proof on this Proposition; first of all, because its truth is undisputed. Then, all the arguments, which go to demonstrate that such is the principle of Individuation in Material Substances, demonstrate, a fortiori, that it is the same in Spiritual Substances. The reason is, that the latter are simple and complete Forms; so that they require no partner to contribute to their perfect substantiality.

But it is here that a difficulty has been made, touching the teaching of St. Thomas; to resolve which, is the motive for introducing