The sermon examines the first missionary journey of Paul and Barnabas, emphasizing that true ministry originates from the Holy Spirit's direction through the local church rather than human initiative. It highlights the critical importance of fasting and prayer as the church discerns God's will, warning against rushing ahead of divine guidance or prioritizing secular projects over evangelism. The preacher contrasts the fervent preaching of the gospel with the deceptive influence of false prophets like Elymas, illustrating how spiritual blindness serves as a judgment on those who oppose truth. Ultimately, the message challenges believers to maintain a serious, focused commitment to spreading the gospel, trusting that God can use even opposition to bring about salvation and demonstrate His sovereign power.