Grudem: Why Was Jesus’ Deity Necessary?

Why Was Jesus’ Deity Necessary?

In the previous section we listed several reasons why it was necessary for Jesus to be fully man in order to earn our redemption. Here it is appropriate to recognize that it is crucially important to insist on the full deity of Christ as well, not only because it is clearly taught in Scripture, but also because (1) only someone who is infinite God could bear the full penalty for all the sins of all those who would believe in him—any finite creature would have been incapable of bearing that penalty; (2) salvation is from the Lord (Jonah 2:9 NASB), and the whole message of Scripture is designed to show that no human being, no creature, could ever save man—only God himself could; and (3) only someone who was truly and fully God could be the one mediator between God and man (1 Tim. 2:5), both to bring us back to God and also to reveal God most fully to us (John 14:9).

Thus, if Jesus is not fully God, we have no salvation and ultimately no Christianity. It is no accident that throughout history those groups that have given up belief in the full deity of Christ have not remained long within the Christian faith but have soon drifted toward the kind of religion represented by Unitarianism in the United States and elsewhere. “No one who denies the Son has the Father” (1 John 2:23). “Any one who goes ahead and does not abide in the doctrine of Christ does not have God; he who abides in the doctrine has both the Father and the Son” (2 John 9).

Grudem, W. A. (2004). Systematic theology: an introduction to biblical doctrine (pp. 553–554). Leicester, England; Grand Rapids, MI: Inter-Varsity Press; Zondervan Pub. House.

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