But this hypostatising of faculties becomes a source of still further difficulties when it is taken in connexion with the hypostasis of the Soul or Self or Ego. To Aristotle the Soul in its general aspect is Energy or Essence; and its individual phases are energies. But in the hands of the untrained these conceptions came to be considerably displaced. Essence or Substance came to be understood (as may be seen in Locke, and still more in loose talk) as a something,—a substratum,—or peculiar nature—(of which _in itself_ nothing further could be said(36) but which notwithstanding was permanent and perhaps imperishable): this something subsistent exhibited certain properties or activities. There thus arose, on one hand, the Soul-thing,—a substance misunderstood and sensualised with a supernatural sensuousness,—a denizen of the transcendental or even of the transcendent world: and, on the other hand, stood the actual manifestations, the several exhibitions of this force, the assignable and describable psychic facts. We are accordingly brought before the problem of how this one substance or essence stands to the several entities or hypostases known as faculties. And we still have in the rear the further problem of how these abstract entities stand to the real and concrete single acts and states of soul and mind. This hypostatising of faculties, and this distinction of the “Substantial” soul from its “accidentia” or phenomena, had grown—through the materialistic proclivities of popular conception—from the indications found in Aristotle. It attained its climax, perhaps in the Wolffian school in Germany, but it has been the resort of superficial psychology in all ages. For while it, on one hand, seemed to save the substantial Soul on whose incorruptibility great issues were believed to hinge, it held out, on the other, an open hand to the experimental inquirer, whom it bade freely to search amongst the phenomena. But if it was the refuge of pusillanimity, it was also the perpetual object of censure from all the greater and bolder spirits. Thus, the psychology of Hobbes may be hasty and crude, but it is at least animated by a belief that the mental life is continuous, and not cut off by abrupt divisions severing the mental faculties. The “image” (according to his materialistically coloured psychology) which, when it is a strong motion, is called sense, passes, as it becomes weaker or decays, into imagination, and gives rise, by its various complications and associations with others, to reminiscence, experience, expectation. Similarly, the voluntary motion which is an effect or a phase of imagination, beginning at first in small motions—called by themselves “endeavours,” and in relation to their cause “appetites” or “desires(37)”—leads on cumulatively to Will, which is the “last appetite in deliberating.” Spinoza, his contemporary, speaks in the same strain(38). “Faculties of intellect, desire, love, &c., are either