Immutability: Evangelism

Without the immutability of God there would be no sense in any true evangelism. If God changed, then the basis for all of “nature,” theology, and life would change. In the most basic of senses unless God is immutable there is no basis for evangelism to have a basis in truth.

If God changed, then the doctrines of sin would no longer be true in the same way. All sin is against God. David taught us this in Psalm 51 when he said this: “against You, You only have I sinned and done what is evil in your sight” (v. 4). All sin is against the character and being of God. If God changes, then the nature of sin in some way will change and evangelism would then be worthless or we would be in need of a revision of Scripture.

The Ten Commandments are really a reflection of the character of God as they are an outworking of the Great Commandments. The Ten Commandments and the Great Commandments as they reflect the character of God are how we are to approach others and are to be used to bring light to others to show them their sin. If God is mutable and so changes, these commandments would change as well since they are reflections of the character of God. If God changes, then the standard of sin has changed and this would change the need for men’s salvation and it would also change the character of the cross.

The Gospel comes to man as a message of good news to sinners. In the Gospel there is the message of the cross of Christ dying for the sins of sinners. However, if God has changed and therefore the standard for sin has changed, then the cross would not be effective for sinners any longer. Sin is defined as lawlessness (I John 3:4) and as falling short of the glory of God (Rom 3:23). If God changes and therefore the standard of sin would, then the punishment suffered by Christ for sins under that Law would no longer be valid. One might argue that God might change so that the cross would not be necessary. Either way, the message of the Gospel would be different because of necessity the cross would not be the means of salvation. Christ’s suffering and death would no longer be able fulfill the curse of the law. The sinner would be left on his or her own.

If God changed which necessitates the Law being changed, then what Christ did as a fulfillment of the Law and earning a perfect righteousness would also be nullified. Christ lived a life under the Law and kept it perfectly as the standard of God. However, if the Law changed then the perfect righteousness earned by Christ would no longer be valid because there would be a different Law and a different standard. Man would be left on his own to try to figure out what that standard was and then to keep it.

The Gospel is based on promise. In it man believes that God will do what He says that He has done and that He will do what He says He will do. But if God changes, there would be no promise of eternal life as man would think of it. If God changed, then eternal life would not be the same and perhaps no eternal life at all. So in evangelism man would have no promises of God to present and no expectation that those promises would be fulfilled.

Evangelism is based, though indeed not expressed that way, on the immutability of God. Believers can talk to unbelievers knowing that God has not changed and will not change. That means that the standard if sin will always be the same and that the cross of Christ is the only satisfaction for sin to keep anyone out of hell. That means that the standard of righteousness is the same and so the imputed righteousness of Christ is the only way for a person to enter heaven. Believers can talk to people about sin, judgment, and righteousness only because God does not change. They can tell people that the standard of God does not change and the command to teach people all that Christ commanded them is true. They can tell people with confidence that all will stand before God on judgment day and all will bow and confess Christ as Lord. They can proclaim the message of Christ that all must be born again. They can tell people that the promises of God are certain because God who cannot change cannot lie. The believer is able to evangelize with certainty because God cannot change. After all, we love Him as He is and our message of our love for God should not change either. If God changed, we would not love Him in the same way and perhaps not at all.


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