How do we know the gospel is effectual?

The effectiveness of the gospel is demonstrated through its ability to transform lives. According to Paul's teaching, the gospel is not just words but is infused with the power of God. In 2 Corinthians 5:15, we see that because Christ died for us, we should no longer live for ourselves but for Him. The gospel, when preached and received in faith, cultivates a new identity and purpose in the believer, enabling them to walk in alignment with God's will and character, reflecting true repentance and rebirth.