Paul confronts Peter for acting in a way that misrepresents the gospel, reminding us that justification is by faith in Christ alone—not by works or law-keeping. When we misuse God’s law as a means of righteousness, we not only mislead others but also obscure the good news of grace. The law functions like a mirror, showing our need for Christ, while only Christ can make us righteous. Justification is a gift received, not earned or maintained through human effort.

Jesus commissioned his apostles (sent ones) to bring his testimony to us — who who haven’t seen the Risen Jesus. Our faith does not come by sight, then, but by hearing. As we hear and receive Scripture’s testimony about who God is and what he’s done for us, we are receiving the very word of Christ, and thereby offered the gift of eternal life. Not by our righteousness, but by his grace; our mere faith is counted by him as righteousness.