In the course of the development of different life-forms heredity—which, in plain English, is unconscious memory generated in the first life-form and transmitted through all the different species—is the sole factor in the preservation of the parent properties; while adaptation to surrounding conditions and circumstances, natural selection in the struggle for existence, and sexual selection in the struggle of the males for females are the principal factors in the differentiation of species. Having traced man’s pedigree according to the Evolution theory, from primitive nebulous matter to his present commanding position, and found him possessed with reason and the power of controlling and regulating the forces of nature, our next inquiry is naturally for what purpose is he here and what will become of him eventually. Here we come to the most difficult problem of all ages, which has baffled learned men of all nationalities, and which will probably never be satisfactorily solved. Intimately connected with it is the almost as difficult problem, How was the universe caused at all? There are eminent scientific men who think they can conclusively show that the universe existed from eternity; others as positively assert that it must have been caused by a power outside and independent of itself; while others are equally convinced that it was self-created. But when we examine their arguments we find ourselves unable logically to accept any of their conclusions. The Atheist declares that the universe has existed from eternity, not having been produced by any other agency, and, therefore, without any beginning; which necessarily implies the conception of infinite past time—an effort of which the human mind is quite incapable. The Pantheist declares that the universe evolved out of potential existence into actual existence by virtue of some inherent necessity; which is as unthinkable as the previous one, for potential existence must be either something, in which case it would be actual existence, or nothing, which it could not possibly be. But admitting, for the sake of argument, the possibility of potential existence as nothing, still we should have to account for its origin, which would involve us in an infinity of still more remote potentialities. The Theistic theory of creation by external agency implies either formation of matter out of nothing, which is inconceivable, or out of pre-existing materials, which leaves us under the necessity of showing the origin of the pre-existing elements, and, like the preceding theory, would involve us in an infinity of remote pre-existences. It also involves the existence of a potentiality outside matter, which must either be caused, which involves a prior cause, or uncaused, in which case it must be either finite or infinite. If it be finite, it must be limited, and, consequently, there must exist something outside its limits, which destroys the notion of its being a first cause. Therefore, it must be infinite.