The Authenticity of the Believer

2 Corinthians 3:1-3

Are we beginning to commend ourselves again? Or do we need, as some, letters of commendation to you or from you? ² You are our letter, written in our hearts, known and read by all men; ³ being manifested that you are a letter of Christ, cared for 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.