John Nelson Darby emphasizes that Christians are representatives of Christ, as evidenced by the transformative power of the truth in their lives. He addresses the Corinthians' doubts about his apostolic authority by pointing to their own conversion as proof of his ministry. Darby explains that true Christianity is not merely about outward conduct but about having Christ engraved on the heart through the Holy Spirit. He contrasts the ministration of the letter, which brings condemnation, with the ministration of the Spirit, which offers righteousness and freedom. Ultimately, believers are called to reflect Christ's love and grace in their lives, serving as living epistles to the world.

John Nelson Darby emphasizes the distinction between the accepted man, Jesus Christ, and the natural man, who is blind to his own condition and lacks the moral motives of Christ. He explains that true acceptance before God is found only in Christ, who embodies the character that God delights in, contrasting this with the self-seeking nature of humanity. Darby urges believers to recognize their identity as 'epistles of Christ,' transformed by the Spirit, and to find liberty in their relationship with God rather than fear. He highlights the futility of trying to attain heaven through the law, which only reveals sin and condemnation, and points to Christ as the Mediator who provides true acceptance. Ultimately, he calls for Christians to reflect Christ's love and character in their lives, becoming living testimonies of His grace.