What does Acts 14:25 mean?

Paul, Barnabas, and Barnabas' cousin had started their missionary voyage (Acts 13:1–3) by sailing from Seleucia on the Syrian coast to Cyprus. From Cyprus, they caught a ship to Perga in the district of Pamphylia on the south-central coast of modern-day Asia Minor. John Mark left them in Perga. It seems Paul and Barnabas headed north without spending any more time in Pamphylia (Acts 13:4–13).

Paul and Barnabas spent the bulk of their time in Antioch, in the district of Pisidia, and Iconium, Lystra, and Derbe in the territory of Galatia in central Asia Minor. After traveling as far east as Derbe, the two revisited each church, encouraging them to stand strong in the face of coming persecution, and establishing elders who could help the new Jesus-followers grow (Acts 13:14—14:23). Paul will visit them again on both his second and third missionary journeys (Acts 16:1–6; 18:23) and he'll send them a letter we call "Galatians."

This time, Paul and Barnabas stop in Perga. Likely, they find a synagogue and explain how Jesus fulfills the prophecies of the Messiah in the Jewish Scriptures. But no mention is made of establishing a church, and the book of Acts does not mention Paul ever returning to Pamphylia. On his second and third trips, Paul reaches the inner cities of Galatia by the over-pass route from Tarsus and comes straight back by ship from Ephesus. When he sails for Rome and house arrest, he passes by Pamphylia, but doesn't stop (Acts 27:5). Neither Perga nor Attalia are mentioned again in the New Testament.