But it must be also observed, that men are thus powerfully, and in an extraordinary or supernatural manner influenced, so that they follow spontaneously at the same time. The operation of God is then twofold; for it is first necessary to shake men, that they may unlearn their whole character, that is, that forgetting their former nature, they may willingly receive the yoke of Christ. We indeed know how great is our perverseness, and how unnameable we are, until God subdues us by his Spirit. There is need in such a case of a violent shaking. But we are not forced to obey Christ, as lions and wild beasts are, who indeed yield, but still retain their inward ferocity, and roar, though led in chains and subdued by scourges and beatings. We are not, then, so shaken, that our inward rebellion remains in us; but we are shaken, so that our disposition is changed, and we receive willingly the yoke of Christ. This is the reason why the Prophet says, I will shake all nations, and they shall come; that is, there will be indeed a wonderful conversion, when the nations who previously despised God, and regarded true religion and piety with the utmost hatred, shall habituate themselves to the ruling power of God: and they shall come, because they shall be so drawn by his hidden influence, that the obedience they shall render will be voluntary. We now perceive the meaning of the Prophet.