In 'The Challenges of Life', the author discusses the ministry of Paul in 2 Corinthians, highlighting the superiority of the new covenant through themes of mercy, perseverance in suffering, and the necessity of a pure heart. Paul emphasizes the transformative power of faith, the importance of truth, and the significance of suffering as a testament to Christ's life and glory. The overall message encourages believers to remain steadfast in their faith despite challenges, focusing on the eternal rewards that lie beyond current hardships.