For now we live, if you stand fast in the Lord.
Paul was faced with a difficulty. He was not able to return to Thessalonica, yet he was not able to rest if he did not return. He therefore did the next best thing and sent his fellow worker Timothy, even though it meant that Paul had to face alone the difficult task of preaching in Athens (3:1-2; cf. Acts 17:16-34). Timothy’s task was to strengthen the Thessalonians’ faith to withstand persecution. Paul did not want the good work already done among them to be destroyed through people turning away from Christ (3-5).