3 You show that you are a letter from Christ, delivered by us, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts.

a true Christian, can not hide the message of Christ in him, a true Christian is a message of Christ walking, is a letter of Christ with shoes, believers bring a message: God is love, God is merciful, is forgiving, is powerful to give life to the one who was dead, is powerful to do a precious work of grace in the one who was a disaster and transform it in his image.