an opposite, a counter-will, to give them meaning. There can be a struggle for existence only when there are obstacles thereto, a will to live only when there are obstructions to life, a will to power only when there is a resistance against which power may be exercised. Expression alone is self-implying and self-sufficient, and in an altogether favorable environment we might have realized our instincts, impulses, interests, appetites and desires, expressed and actualized our potentialities, and when our day is done, have ceased, as unconcerned about going on as about starting. Metchnikoff speaks somewhere of an instinct toward death and the euphoria which accompanies its realization. He cites, I think, no more than two or three cases. To most of us the mere notion of the existence and operation of such an instinct seems fanciful and uncanny. Yet from the standpoint of biology nothing should be more natural. Each living thing has its span, which consists of a cycle from birth through maturation and senescence to dissolution, and the latter half of the process is as "fateful" and "inevitable" as the former! Dying is itself the inexpugnable conclusion of that setting free of organic potentialities which we call life, and if dying seems horrid and unnatural, it seems so because for most of us death is violent, because its occasion is a shock from without, not the realization of a tendency from within. In a completely favorable environment we should not struggle to exist, we should simply exist; we should not will to live, we should simply live, i.e., we should actualize our potentialities and die.