It is easier to‐day than at any other previous period of history to believe in the union of the believer with Christ. That God is immanent in the universe, and that there is a divine element in man, is familiar to our generation. All men are naturally one with Christ, the immanent God, and this natural union prepares the way for that spiritual union in which Christ joins himself to our faith. Campbell, The Indwelling Christ, 131—“In the immanence of Christ in nature we find the ground of his immanence in human nature.... A man may be out of Christ, but Christ is never out of him. Those who banish him he does not abandon.” John Caird, Fund. Ideas of Christianity, 2:233‐256—“God is united with nature, in the atoms, in the trees, in the planets. Science is seeing nature full of the life of God. God is united to man in body and soul. The beating of his heart and the voice of conscience witness to God within. God sleeps in the stone, dreams in the animal, wakes in man.” A. Negatively.—It is not: (_a_) A merely natural union, like that of God with all human spirits,—as held by rationalists. In our physical life we are conscious of another life within us which is not subject to our wills: the heart beats involuntarily, whether we sleep or wake. But in our spiritual life we are still more conscious of a life within our life. Even the heathen said: “Est Deus in nobis; agitante calescimus illo,” and the Egyptians held to the identification of the departed with Osiris (Renouf, Hibbert Lectures, 185). But Paul urges us to work out our salvation, upon the very ground that “_it is God that worketh_” in us, “_both to will and to work, for his good pleasure_” (_Phil. 2:12, 13_). This life of God in the soul is the life of Christ. The movement of the electric car cannot be explained simply from the working of its own motor apparatus. The electric current throbbing through the wire, and the dynamo from which that energy proceeds, are needed to explain the result. In like manner we need a spiritual Christ to explain the spiritual activity of the Christian. A. H. Strong, Sermon before the Baptist World Congress in London, 1905—“We had in America some years ago a steam engine all whose working parts were made of glass. The steam came from without, but, being hot enough to move machinery, this steam was itself invisible, and there was presented the curious spectacle of an engine, transparent, moving, and doing important work, while yet no cause for this activity was perceptible. So the church, humanity, the universe, are all in constant and progressive movement, but the Christ who moves them is invisible. Faith comes to believe where it cannot see. It joins itself to this invisible Christ, and knows him as its very life.”