In the second place, Spiritual Life is not something outside ourselves. The idea is not that Christ is in heaven and that we can stretch out some mysterious faculty and deal with Him there. This is the vague form in which many conceive the truth, but it is contrary to Christ's teaching and to the analogy of nature. Vegetable Life is not contained in a reservoir somewhere in the skies, and measured out spasmodically at certain seasons. The Life is _in_ every plant and tree, inside its own substance and tissue, and continues there until it dies. This localization of Life in the individual is precisely the point where Vitality differs from the other forces of nature, such as magnetism and electricity. Vitality has much in common with such forces as magnetism and electricity, but there is one inviolable distinction between them--that Life is permanently fixed and rooted in the organism. The doctrines of conservation and transformation of energy, that is to say, do not hold for Vitality. The electrician can demagnetize a bar of iron, that is, he can transform its energy of magnetism into something else--heat, or motion, or light--and then re-form these back into magnetism. For magnetism has no root, no individuality, no fixed indwelling. But the biologist cannot devitalize a plant or an animal and revivify it again.[50] Life is not one of the homeless forces which promiscuously inhabit space, or which can be gathered like electricity from the clouds and dissipated back again into space. Life is definite and resident; and Spiritual Life is not a visit from a force, but a resident tenant in the soul.
This is, however, to formulate the statement of the third point, that Spiritual Life is not an ordinary form of energy or force. The analogy from Nature indorses this, but here Nature stops. It cannot say what Spiritual Life is. Indeed what natural Life is remains unknown, and the word Life still wanders through Science without a definition. Nature is silent, therefore, and must be as to Spiritual Life. But in the absence of natural light we fall back upon that complementary revelation which always shines, when truth is necessary and where Nature fails. We ask with Paul when this Life first visited him on the Damascus road, What is this? "Who art Thou, Lord?" And we hear, "I am Jesus."[51]
We must expect to find this denied. Besides a proof from Revelation, this is an argument from experience. And yet we shall still be told that this Spiritual Life is a force. But let it be remembered what this means in Science, it means the heresy of confounding Force with Vitality. We must also expect to be told that this Spiritual Life is simply a development of ordinary Life--just as Dr. Bastian tells us that natural Life is formed according to the same laws which determine the more simple chemical combinations. But remember what this means in Science. It is the heresy of Spontaneous Generation, a heresy so thoroughly discredited now that scarcely an authority in Europe will lend his name to it. Who art Thou, Lord? Unless we are to be allowed to hold Spontaneous Generation there is no alternative: Life can only come from Life: "I am Jesus."
A hundred other questions now rush into the mind about this Life: How does it come? Why does it come? How is it manifested? What faculty does it employ? Where does it reside? Is it communicable? What are its conditions? One or two of these questions may be vaguely answered, the rest bring us face to face with mystery. Let it not be thought that the scientific treatment of a Spiritual subject has reduced religion to a problem of physics, or demonstrated God by the laws of biology. A religion without mystery is an absurdity. Even Science has its mysteries, none more inscrutable than around this Science of Life. It taught us sooner or later to expect mystery, and now we enter its domain. Let it be carefully marked, however, that the cloud does not fall and cover us till we have ascertained the most momentous truth of Religion--that Christ is in the Christian.