What does 2 Corinthians 8:19 mean?
Paul is sending three delegates to Corinth to deliver this letter and to help collect their contribution to the suffering Christians in Jerusalem. He first mentioned Titus, recently returned from Corinth and now well known to them. He next mentioned an unnamed man famous for proclaiming the gospel.This man has been appointed by the churches, likely in the Macedonian region, to represent them and travel with the team that is collecting and distributing these funds. Paul again refers to the collection as an act of grace, meaning that it is being carried out by the freewill of all the churches who are participating in it. Paul adds that this act of grace is ultimately for the Lord's glory, but also to show the good will of all those who contribute.
The Jewish Christians and Gentile Christians did not always get along. Paul didn't like the division between them and perhaps saw this collection as an opportunity for Gentile Christians to express love and support for the Jewish believers in Jerusalem and maybe help to heal some of those tensions (Romans 15:25–28).