Paul’s life became tireless, proclaiming and living out the message of Christ: "Christians die baptismally to sin and are buried with Christ; they are dead to all that is sinful and unredeemed in the world. They are made into a new creation, already sharing Christ’s victory and someday to rise from the dead like him. Through this risen Christ the Father pours out the Spirit on them, making them completely new. " (American Catholic)
So Paul’s great message to the world was: You are saved entirely by God, not by anything you can do. Saving faith is the gift of free, personal and loving commitment to Christ.