Charles Hodge:

1) This teaches, 1. That the certainty of salvation is secured by the death of Christ. He did not die merely to render salvation possible, but to make it certain. This it does because it is a complete satisfaction of justice. It answers all the ends which our perdition could possibly answer, and therefore it renders that perdition unnecessary. Christ cannot fail to see of the travail of his soul. Those cannot perish for whom he died. That Christ died to render salvation not only possible, but certain, is true, secondly, because the salvation of his people was promised him in that covenant, in the execution of which he laid down his life. Charles Hodge, ‘Christ, His Person and Offices,” in Conference Papers, (New York, Charles, Scribner’s Sons, 1879), 38.

2) As God in the course of nature and in the dispensation of his providence, moves on in undisturbed majesty, little concerned at the apparent complication or even inconsistency of one effect or one dispensation with another; so the Spirit of God in the Bible unfolds the purposes, truths, and dealings of God, just as they are, assured that even finite minds will ultimately be able to see the consistency of all his revelations. The doctrines of foreordination, sovereignty, and effectual providential control, go hand in hand with those of the liberty and responsibility of rational creatures. Those of freedom from the law, of salvation by faith without works, and of the absolute necessity of holy living stand side by side. On the same page we find the assurance of God’s love to sinners, and declarations that He would that all men should come unto Him and live, with explicit assertions that He has determined to leave multitudes to perish in their sins. In like manner, the express declarations that it was the incomprehensible and peculiar love of God for his own people, which induced Him to send his Son for their redemption; that Christ came into the world for that specific object; that He died for his sheep; that He gave Himself for his Church; and that the salvation of all for whom He thus offered Himself is rendered certain by the gift of the Spirit to bring them to faith and repentance, are intermingled with declarations of good-will to all mankind, with offers of salvation to every one who will believe in the Son of God, and denunciations of wrath against those who reject these overtures of mercy. All we have to do is not to ignore or deny either of these modes of representation, but to open our minds wide enough to receive them both, and reconcile them as best we can. Both are true, in all the cases above referred to, whether we can see their consistency or not…

The opposite, or anti-Augustinian doctrine, is founded on a partial view of the facts of the case. It leaves out of view the clearly revealed special love of God to his peculiar people; the union between Christ and his chosen; the representative character which He assumed as their substitute; the certain efficacy of his sacrifice in virtue of the covenant of redemption; and the necessary connection between the gift of Christ and the gift of the Holy Spirit. It moreover leads to confused and inconsistent views of the plan of salvation, and to unscriptural and dangerous theories of the nature of the atonement. It therefore is the limited and meager scheme; whereas the orthodox doctrine is catholic and comprehensive; full of consolation and spiritual power, as well as of justice to all mankind. Charles. Hodge, Systematic Theology, 2:561 and 562.