What does the Bible say about being an epistle of Christ?

In 2 Corinthians 3:2-3, Paul refers to believers as the epistle of Christ, indicating that their lives should be a testament to His grace and work in them. This epistle is ministered by the apostles, and it is not merely text written with ink, but a transformative work of the Spirit in the hearts of the faithful. The manifestation of believers as Christ's epistles shows the changing power of the gospel, highlighting that it is God who writes His truths in the hearts of His people, enabling them to reflect His glory in their lives.