Zac Poonen emphasizes that Paul's authority stemmed from his profound love for all people, which was essential for God to commit His authority to him. Paul, despite being an earthen vessel, allowed the treasure of Christ within him to shine through his love and service to others, both believers and unbelievers. He demonstrated that true authority in ministry comes from a heart of servanthood, recognizing the worth of every individual, regardless of their status. Poonen challenges listeners to reflect on their own attitudes towards others, urging them to embody the love of Christ and serve selflessly, as Paul did. Ultimately, the sermon calls for a deeper understanding of love as a fundamental aspect of Christian life and ministry.