All that vast development of doctrine, worship, and government, which we have been endeavouring to trace out, has been from first to last originated, accompanied, and maintained by the action of the Holy Spirit upon each individual heart. Here at last is the power which we seek in vain to detect as lodged in any natural gift possessed by the preacher. The heart is that sanctuary of liberty which no human power can invade: the heart's free acceptance of the belief offered to it is the result which no human power can win. If the Church's one Episcopate has thrown the net of Christ over the whole empire, and into regions more or less barbarous beyond it; if the Church's one doctrine has grown out into palpable form, scattering the gods of heathendom with the demons who lurked under their masks, and uplifting the strong personality of the divine Triad, in spite of pantheism, to universal adoration; if the Church's one worship has come forth from the catacombs into the light of day, and the celebration over a martyr's body in an obscure vault to a celebration in lordly temple, rich with marble and precious stones; the one adequate cause for all is the manifestation of spirit and of power, the cross set up in the heart of man before it was applied to living members of the body: it is a process inexplicable save upon the supposition of divine power. That world which by wisdom knew not God, which philosophy had failed to convert, was converted in a great proportion of its subjects by the foolishness of God which was wiser than men, and the weakness of God which was stronger than men. A crucified God was the palmary test of this foolishness and weakness; the army of martyrs was its witness; the empire's recognition of the Church's freedom in doctrine, worship, and government, was the victory which it gained.