The protoplasm in man has a something in addition to its instincts or its habits. It has a capacity for God. In this capacity for God lies its receptivity; it is the very protoplasm that was necessary. The chamber is not only ready to receive the new Life, but the Guest is expected, and, till He comes, is missed. Till then the soul longs and yearns, wastes and pines, waving its tentacles piteously in the empty air, feeling after God if so be that it may find Him. This is not peculiar to the protoplasm of the Christian's soul. In every land and in every age there have been altars to the Known or Unknown God. It is now agreed as a mere question of anthropology that the universal language of the human soul has always been "I perish with hunger." This is what fits it for Christ. There is a grandeur in this cry from the depths which makes its very unhappiness sublime.
The other quality we are to look for in the soul is mouldableness, plasticity. Conformity demands conformability. Now plasticity is not only a marked characteristic of all forms of life, but in a special sense of the highest forms. It increases steadily as we rise in the scale. The inorganic world, to begin with, is rigid. A crystal of silica dissolved and redissolved a thousand times will never assume any other form than the hexagonal. The plant next, though plastic in its elements, is comparatively insusceptible of change. The very fixity of its sphere, the imprisonment for life in a single spot of earth, is the symbol of a certain degradation. The animal in all parts is mobile, sensitive, free; the highest animal, man, is the most mobile, the most at leisure from routine, the most impressionable, the most open for change. And when we reach the mind and soul, this mobility is found in its most developed form. Whether we regard its susceptibility to impressions, its lightning-like response even to influences the most impalpable and subtle, its power of instantaneous adjustment, or whether we regard the delicacy and variety of its moods, or its vast powers of growth, we are forced to recognize in this the most perfect capacity for change. This marvellous plasticity of mind contains at once the possibility and prophecy of its transformation. The soul, in a word, is made to be _converted_.
Second: The Life.
The main reason for giving the Life, the agent of this change, a separate treatment, is to emphasize the distinction between it and the natural man on the one hand, and the spiritual man on the other. The natural man is its basis, the spiritual man is its product, the Life itself is something different. Just as in an organism we have these three things--formative matter, formed matter, and the forming principle or life; so in the soul we have the old nature, the renewed nature, and the transforming Life.
This being made evident, little remains here to be added. No man has ever seen this Life. It cannot be analyzed, or weighed, or traced in its essential nature. But this is just what we expected. This invisibility is the same property which we found to be peculiar to the natural life. We saw no life in the first embryos, in oak, in palm, or in bird. In the adult it likewise escapes us. We shall not wonder if we cannot see it in the Christian. We shall not expect to see it. _A fortiori_ we shall not expect to see it, for we are further removed from the coarser matter--moving now among ethereal and spiritual things. It is because it conforms to the law of this analogy so well that men, not seeing it, have denied its being. Is it hopeless to point out that one of the most recognizable characteristics of life is its unrecognizableness, and that the very token of its spiritual nature lies in its being beyond the grossness of our eyes?
We do not pretend that Science can define this Life to be Christ. It has no definition to give even of its own life, much less of this. But there are converging lines which point, at least, in the direction that it is Christ. There was One whom history acknowledges to have been the Truth. One of His claims was this, "I am the Life." According to the doctrine of Biogenesis, life can only come from life. It was His additional claim that His function in the world was to give men Life. "I am come that ye might have Life, and that ye might have it more abundantly." This could not refer to the natural life, for men had that already. He that hath the Son hath another Life. "Know ye not your own selves how that Jesus Christ is in you."