What does 2 Corinthians 8:23 mean?
Paul gives one more recommendation for the three men coming to Corinth to help collect funds for the suffering Christians in Jerusalem. He describes Titus, whom they now know, as his partner and fellow worker for their benefit. Paul helped to mentor Titus, but he described him as a partner, especially in Paul's recent relationship with the Corinthian people.Here he calls the other two men "our brothers" and messengers of the churches they represent. It may be that the Corinthians know these men, also. If so, these two will vouch for the legitimacy of the collection for the Jerusalem Christians and provide oversight to it.
These words add that the churches they represent are the "glory of Christ." Those who represent Christ in acts of grace, like giving to people in need, bring glory to Christ on earth. That's what Christian churches are meant to do, something Paul hopes those in the church in Corinth will understand and participate in fully.