For after all it is not in the main on account of ourselves that we cherish a grudge against the ‘common enemy’ and dispute his authority, but for the sake of those we love. For ourselves we may be indifferent or acquiescent; but somehow for those others, for those divine ones who have taken our hearts into their keeping, we resent the idea that _they_ can perish. We refuse to entertain the thought. Love in some mysterious way forbids the fear of death. Whether it be Siegfried who tramples the flaming, circle underfoot, or the Prince of Heaven who breaks his way through the enchanted thicket, or Orpheus who reaches his Eurydice even in the jaws of hell, or Hercules who wrestles with the lord of the underworld for Alcestis—the ancient instinct of mankind has declared in no uncertain tone that in this last encounter Love must vanquish. It is in the name, then, of one of these gods that we challenge the other. And yet not without gratitude to both. For it is Azrael’s invasion of our world, it is his challenge to _us_, that (perhaps more than anything else) rivets our loyalty to each other. It is his frown that wakes friendship in human souls and causes them to tighten the bonds of mutual devotion. In some strange way these two, though seeming enemies, play into each other’s hands; each holds the secret of the other, and between them they conceal a kindred life and some common intimate relation. We feel this in our inmost intuitions; we perceive it in our daily survey of human affairs; and we find it illustrated (as I shall presently point out) in general biology and the life-histories of the most primitive cells. The theme, in fact, of the interplay of Love and Death will run like a thread-motive through this book—not without some illumination, as I would hope, cast by each upon the other, and by both upon our human destiny. CHAPTER II THE BEGINNINGS OF LOVE As I have just suggested, the great human problems of Love and Death are strangely and remarkably illustrated in the most primitive forms of life; and I shall consequently make no apology for detaining the reader for a few moments over modern investigations into the subjects of cell-growth, reproduction and death. If this chapter is a little technical and complex in places, still it may be worth while delaying over it, and granting it some patient consideration, on account of the curious light the study throws on the rest of the book and the general questions therein discussed.