When were Paul's letters to the churches written and what are they still used for?

Les explains that in the timeline, Paul was still in the period of the Acts when he was writing these various letters to all the churches in Asia Minor and Greece. Les teaches that we are still using them now to complete the Body of Christ, to bring Gentiles as well as some Jews out of their lostness and into a knowledge of salvation. Paul had to overcome objections to his apostleship constantly, and he pointed to the Corinthians as proof, since they had been saved out of abject paganism through his preaching. His one driving desire was to see lost people saved.