Luke concludes the book of Acts with Paul a prisoner in Rome, yet still “proclaiming the kingdom of God and teaching about the Lord Jesus Christ with all boldness and without hindrance” (Acts 28:31). Though he was held captive by Rome, and many of his hearers were held captive by unbelief, he knew that God’s word was not bound; and Paul was willing to endure anything if it would bring about salvation for the glory of God (2 Tim. 2:8-10). In this sermon, Joel Traylor teaches that not only will Jesus work all things out for his glory—even imprisonment and unbelief—but that his gospel is the power of God for salvation. Our gospel witness isn’t pointless because only God can change the heart; our gospel witness is essential because God changes the heart as we preach Christ.