Albert Barnes Commentary Acts 20:2

"And when he had gone through those parts, and had given them much exhortation, he came into Greece." — Acts 20:2 (ASV)

Over those parts. The parts of the country in and near Macedonia. He probably went to Macedonia via Troas, where he expected to find Titus (2 Corinthians 2:12); but not finding him there, he went by himself to Philippi, Thessalonica, and other places, and then returned to Greece Proper.

Into Greece. Into Greece Proper, of which Athens was the capital. While in Macedonia, he had great anxiety and trouble, but was eventually comforted by the coming of Titus, who brought him news of the generous disposition of the churches of Greece regarding the collection for the poor saints at Jerusalem (2 Corinthians 7:5–7). It is probable that the Second Epistle to the Corinthians was written during this time in Macedonia and sent to them by Titus. See Note of Doddridge.