A general or even a local arrest of development is almost always due to the phenomenon of mental inhibition experienced by the same being; it definitely ceases to see the plan, evolution stops, and the embryo, expelled before the time takes on the form of the evolutionary stage it had reached at that moment; if it ceases to deal with a single detail only that detail remains in _statu quo_, and is often embedded in portions of the organism quite away from the point where it would have been found had it continued to evolve; certain cysts belong to this class. The third factor, the Spirit, the Soul--or, to be more exact, the incarnated divine ray--follows a line of evolution parallel to that of the matter which constitutes its form, its instrument; this parallelism is so complete that it has deceived observers insufficiently acquainted with the wonders of evolution. It is thus that scientific materialism has taken root. We will endeavour to set forth the mistake that has been made, and call to mind the correctness of the Vedantin symbol, which represents the soul as lame, incapable of acting without the giant, force-matter; though the latter, without the guidance of the former, could not advance along the path of evolution. This soul is a "no-thing," which, in reality, is everything; a ray of the spiritual sun (_God_), a divine spark incarnated in the vibration (_matter_) produced by the supreme Being, it is a "centre," capable of all its Father's potentialities. These potentialities, which may be grouped together under three general heads--power, love, and wisdom--we may sum up in the one word: consciousness. It is, indeed, a "centre of consciousness" in the germinal state, that is about to blossom forth, realising all its possibilities and becoming a being fully aware of its unity with the Being from which it comes and which it will then have become.