Why is Paul not ashamed of the gospel?

Paul's declaration of not being ashamed of the gospel stems from his deep conviction about its inherent power and purpose. In Romans 1:16, he describes the gospel as the power of God for salvation to everyone who believes. This confidence is rooted in his personal experience of transformation, having been radically changed from a zealous persecutor of the church to a devoted apostle of Christ. The gospel embodies the very essence of God's redemptive work in history, promising hope, life, and reconciliation to a lost world. Therefore, Paul’s lack of shame is a testimony to the gospel's ability to penetrate human hearts, regardless of their condition, and to bring forth new life through faith.