Galatians 3:1-6 Justification and the Spirit (December 28, 2025 AM, Dr. Michael Grasso)

"How do we know that justification is truly by faith alone?

Paul’s answer in Galatians 3 is striking: the Holy Spirit Himself bears witness to it.

In this sermon, we examine Paul’s argument in Galatians 3:1–6 and see how the doctrine of justification by faith is confirmed by the testimony of the Triune God. Paul does not appeal first to church authority or human reasoning, but to what God Himself has done—through Christ crucified, the giving of the Spirit, suffering for the gospel, and even signs and wonders.

Paul reminds the Galatians that Christ was proclaimed to them as crucified through the preaching of the Word, and that the Spirit was given to them not by works of the law, but by the hearing of faith. The same Spirit who began the Christian life must also be the one who perfects it. To turn back to works is not progress—it is regression.

This passage also teaches us how justification and sanctification are inseparably connected. Having begun by the Spirit, we are not perfected by the flesh. Growth in holiness comes through faith, union with Christ, and diligent use of the means of grace—not through self-reliant striving.

Paul’s argument reaches its climax by pointing to the Spirit’s miraculous work among the Galatians as God’s own confirmation of the gospel they received. To reject justification by faith is therefore not merely to reject a doctrine, but to resist the testimony of God Himself.

This sermon calls us to hear the witness of the Father who gives the Spirit, the Son who was crucified for sinners, and the Spirit who confirms the truth of the gospel—so that we might stand firm in justification by faith alone."