Theodore Epp emphasizes that the crucifixion of Christ is not merely a historical event but a transformative way of life that leads to resurrection and freedom from sin. He contrasts the self-glory sought by the Judaizers through fleshly accomplishments with the true glory found in the cross of Christ. Epp warns against living a Christian life based on fleshly efforts, urging believers to find their boast in the crucified and risen Savior. The sermon challenges listeners to reflect on what they truly boast about in their lives.