Psychic force has still to be defined. It is the unknown cause of certain effects, taking its color from them only. With reference to independent physical manifestations, it is the power to produce "the movement of heavy substances without contact or material connection." In this sense, Arago "is stated" to have reported to the Academy of Science, "that, under peculiar conditions, the human organization gives forth a physical power which, without visible instruments, lifts heavy bodies, attracts or repels them, according to a law of polarity, overturns them, and produces the phenomena of sound."[54] When considered in relation to the whole mass of spiritualistic phenomena, its vague, unsatisfactory character becomes still more apparent. The nearest approach to a definition of psychic force, in its larger sense, that I have met with occurs in Mr. Atkinson's communication (_Rep._, p. 105): "It is nothing more than the ordinary and normal power of our complex nature acting without impediment" (consciousness being one of the impediments), "and diverted from its usual relations, though in some cases abnormal conditions clearly favor the development." It is hardly possible to mistake the pantheistic character of this passage; for this unconditioned nature, underlying personal consciousness, which, in virtue of its being unconditioned, knows all and can do all, what else can it be but a common nature, an _anima mundi_, a world-god? according to the pantheistic conception of Averrhoes, "an intelligence which, without multiplication of itself, animates all the individuals of the human species, in respect to their exercising the functions of a rational soul."[55] I am convinced that psychic force, if drawn out as the one solution of spiritualism, can end in nothing short of this; but, on the other hand, I readily admit that the "_anima mundi_" or rather, "spirit of nature," as advocated by Dr. H. More, Glanvil, and, if he is not misrepresented, the famous Carmente doctor, John Bacon,[56] is not pantheistic. More, formally rejecting the doctrine of Averrhoes as "atheism," insists that the "spirit of nature" is substantially distinct from, though in intimate relations with, individual souls. He defines it to be "a substance incorporeal," how far possessing "sense and animadversion" he may not determine, but certainly "devoid of reason and free-will," "pervading the whole matter of the universe, and exercising a plastical power therein, according to the sundry predispositions and occasions in the parts it works upon, raising such phenomena in the world, by directing the parts of matter and their motion, as cannot be resolved into mere mechanical powers."[57]