"Matter and Spirit," says Davis, "have heretofore been supposed to constitute two distinct and independent substances, the latter not having any material origin." ... "Instead of making material and spiritual existence totally disconnected, the object and intention of the foregoing has been to prove, by acknowledged laws and principles of matter, _the production of intelligence,_ the perfection of which is _spirit_;" to show that "the Organizer uses Nature and all things therein as an effect, to produce _spirit_ as an end and designed ultimate." The author of "The Purpose of Existence" adopts a similar view. He tells us, indeed, that "the first simple forms or states of existence are admitted to be _two_, spirit and matter,--the first the moving power, the second the moved substance;" that of the positive essence of either we can arrive at no knowledge; and that "whether spirit be a refined, etherealized portion of matter, or a distinct dynamic principle, we cannot ascertain." And yet, one of the leading objects of his work is to account for "the origin and development of the human mind;" and this he does by ascribing it to "a self-dynamic spirit which is resident in matter," and which he denominates "the spirit of vitality." The spirit exists in vegetables, and is extracted by means of the organs of the animals which feed upon them, and then, "by a delicate work of distillation, it is converted into _spirit_!"--"Nature proclaims one of her great working principles to be, that _spirit is evolved out of matter, and outlives the body in which it is educated_."--"Matter is full of spirit. This spirit is brought out of matter by vegetation. By means of vegetation, it is conveyed into animal frames, in which its purest essence centres in the brain.... This is no idle theory," he adds, "no vain hypothesis, for making matter think. It is a clear proposition, showing how matter is employed by the Supreme Intelligence for evolving, training, and educating spirit."--"We conclude that Progression is the great law of the universe, the purpose for which its present arrangement was ordained; and that the object of this progression is _the evolvement of mind out of matter._"