Bergson sets forth his views of evolution in terms of literature and philosophy.  Professor Moore embodies similar views in his volume, set forth in terms of molecular science.  Both make evolution a creative and a continuous process.  Bergson lays the emphasis upon the cosmic spirit interacting with matter.  Professor Moore lays the emphasis upon the indwelling potencies of matter itself (probably the same spirit conceived of in different terms).  Professor Moore philosophizes as truly as does Bergson when he says “there must exist a whole world of living creatures which the microscope has never shown us, leading up to the bacteria and the protozoa.  The brink of life lies not at the production of protozoa and bacteria, which are highly developed inhabitants of our world, but away down among the colloids; and the beginning of life was not a fortuitous event occurring millions of years ago and never again repeated, but one which in its primordial stages keeps on repeating itself all the time in our generation.  So that if all intelligent creatures were by some holocaust destroyed, up out of the depths in process of millions of years, intelligent beings would once more emerge.”  This passage shows what a speculative leap or flight the scientific mind is at times compelled to take when it ventures beyond the bounds of positive methods.  It is good philosophy, I hope, but we cannot call it science.  Thrilled with cosmic emotion, Walt Whitman made a similar daring assertion:—­

    “There is no stoppage, and never can be stoppage,
    If I, you, and the worlds, and all beneath or upon their surfaces,
      were this moment reduced back to a pallid float, it would
      not avail in the long run,
    We should surely bring up again where we now stand,
    And surely go as much farther, and then farther and farther.”

II

Evolution is creative, whether it works in matter—­as Bergson describes, or whether its path lies up through electrons and atoms and molecules, as Professor Moore describes.  There is something that creates and makes matter plastic to its will.  Whether we call matter “the living garment of God,” as Goethe did, or a reservoir of creative energy, as Tyndall and his school did, and as Professor Moore still does, we are paying homage to a power that is super-material.  Life came to our earth, says Professor Moore, through a “well-regulated orderly development,” and it “comes to every mother earth of the universe in the maturity of her creation when the conditions arrive within suitable limits.”  That no intelligent beings appeared upon the earth for millions upon millions of years, that for whole geologic ages there was no creature with more brains than a snail possesses, shows the almost infinitely slow progress of development, and that there has been no arbitrary or high-handed exercise of creative power.  The universe is not run on principles of modern business efficiency, and man is at the head of living forms, not by the fiat of some omnipotent power, some superman, but as the result of the operation of forces that balk at no delay, or waste, or failure, and that are dependent upon the infinitely slow ripening and amelioration of both cosmic and terrestrial conditions.