As man by his apostasy from God, through ambition and self-love, was separated from him, and fell from the perfection in which he was created, so he must of necessity return to his original tranquillity and happiness, by a _union_ with God; in which the whole of human perfection consists. It was therefore necessary, that the Son of God should become man, in order that human nature, being again united to God, might thereby be restored to its primitive integrity and perfection. As the divine and human natures are united in the one Person of Christ, so must we all, through grace, be united to him by faith, as to our eternal and sovereign Good. In this manner it pleased God to rectify the exceeding corruption of our nature by the abounding goodness of his grace. This union is declared by the Son of God himself: “I will betroth thee,” says he, “unto me for ever, in loving kindness and in mercies.” Hos. 2:19. For since our nature is infected and corrupted by _sin_, which is the greatest of evils, it could not be restored and healed but by GOD himself, the sovereign Good. 2. Now as the union of the divine and the human natures in Christ is eternal, and is never to be dissolved, insomuch that even death itself could not break asunder so sacred a bond: so Christ our Head is to be so firmly united with his faithful members, that neither life nor death may ever be able to separate them from him. This is also declared by the prophet Hosea, in the Person of Christ: “I will,” says he, “betroth thee unto me for ever.” 3. This union by faith, is of the highest necessity, because “our iniquities have separated between us and our God.” Isa. 59:2. And this deplorable state will continue to all eternity, unless Christ dwell in us here by faith. Moreover, we are not able to do the least good, unless Christ himself work it in us. Hence, says the apostle, “Not I, but the grace of God which is with me.” 1 Cor. 15:10. And the Lord himself says: “Without me ye can do nothing” (John 15:5); the truth of which he illustrates by the beautiful parable of the vine and the branches. Whence it naturally follows, that if we are, or do, any good at all, it is altogether to be ascribed to God alone; according to what is said by the prophet: “Thou hast wrought all our works in us” (Isa. 26:12); and by another: “I am like a green fir-tree. From me is thy fruit found.” Hos. 14:8.