Afterward I came - In this account be has omitted a circumstance recorded by Luke Acts 9:29, of the controversy which he had with the Grecians (Hellenists). It was not material to the purpose which he has here in view, which is to state that he was not indebted to the apostles for his knowledge of the doctrines of Christianity. He therefore merely states that he left Jerusalem soon after he went there, and traveled to other places.
The regions of Syria - Syria was between Jerusalem and Cilicia. Antioch was the capital of Syria, and in that city and the adjacent places he spent considerable time; compare Acts 15:23, Acts 15:41.
Cilicia - This was a province of Asia Minor, of which Tarsus, the native place of Paul, was the capital; see the note at Acts 6:9.

Afterwards I came into the regions of Syria, etc. - The course of the apostle's travels, after his conversion, was this: He went from Damascus to Jerusalem, and from Jerusalem into Syria and Cilicia. "At Damascus the disciples took him by night, and let him down by the wall in a basket; and when Saul was come to Jerusalem, he assayed to join himself to the disciples;" Acts 9:25, Acts 9:26. Afterwards, when the brethren knew the conspiracy formed against him at Jerusalem, they brought him down to Caesarea, and sent him forth to Tarsus, a city of Cilicia, Acts 9:30. This account in the Acts agrees with that in this epistle.

Afterwards I came into the regions of Syria and Cilicia. For having disputed against the Grecians at Jerusalem, and being too hard for them, it so irritated them, that they were going to murder him; which being known to the brethren there, they got him out of the way, and had him down to Caesarea, and so to Tarsus, a city in Cilicia; where he was born; in which places and in the countries about he preached the Gospel of Christ; to Tarsus, Barnabas went for him seeking him, and finding him brought him to Antioch in Syria; and both in Syria and Cilicia he preached, no doubt with success, since we read of believing Gentiles and churches in those parts he afterwards visited; being sent along with others, with the letter and decrees of the synod at Jerusalem to them, and whom he confirmed; See Gill on Acts 15:23,
See Gill on Acts 15:41, in the Greek text these countries are called "climates"; a climate in geography is said (y) to be a part of the surface of the earth, bounded by two circles parallel to the equator, and of such a breadth as that the longest day in the parallel nearer the pole, exceeds the longest day in that next the equator, by some certain space, viz. half an hour--. The beginning of the climate is the parallel circle wherein the day is the shortest, the end of the climate is that wherein the day is the longest;--each climate only differs from its contiguous ones, in that the longest day in summer is longer or shorter by half an hour in the one place than in the other:--vulgarly the term climate is bestowed on any country or region differing from another, either in respect of the seasons, the quality of the soil, or even the manners of the inhabitants, without any regard to the length of the longest day; in which sense it seems to be used here, as also in Romans 15:23. Of the country of Syria; see Gill on Matthew 4:24. Cilicia is a country of Asia Minor, now called Caramania; it had its name of Cilicia, as Herodotus says (z), from Cilix, the son of Agenor, a Phoenician: though Bochart (a) derives it from Challekim or Challukim, which signifies stones, it being a stony country; and so Herodotus (b) calls it "mountainous" Cilicia; it is said to have Pamphilia on the west, the tops of Mount Taurus on the north, Mount Amanus on the east, and the Cilician sea on the south; Jerom says (c), Cilicia is a province of Asia, which the river Cydnus cuts in the middle, and Mount Amanus, of which Solomon makes mention, separates it from Syria-Coele.
(y) Chambers's Cyclopaedia in the word "Climate". (z) L. 7. Polymnia, c. 91. Solinus, c. 51. (a) Canaan, p. 376. (b) L. 2. Euterpe, c. 34. (c) De locis Hebraicis, fol. 95. M.

I came into . . . Syria and Cilicia--"preaching the faith" (Galatians 1:23), and so, no doubt, founding the churches in Syria and Cilicia, which he subsequently confirmed in the faith (Acts 15:23, Acts 15:41). He probably went first to CÃ&brvbr;sarea, the main seaport, and thence by sea to Tarsus of Cilicia, his native place (Acts 9:30), and thence to Syria; Cilicia having its geographical affinities with Syria, rather than with Asia Minor, as the Tarsus mountains separate it from the latter. His placing "Syria" in the order of words before "Cilicia," is due to Antioch being a more important city than Tarsus, as also to his longer stay in the former city. Also "Syria and Cilicia," from their close geographical connection, became a generic geographical phrase, the more important district being placed first [CONYBEARE and HOWSON]. This sea journey accounts for his being "unknown by face to the churches of Judea" (Galatians 1:22). He passes by in silence his second visit, with alms, to Judea and Jerusalem (Acts 11:30); doubtless because it was for a limited and special object, and would occupy but a few days (Acts 12:25), as there raged at Jerusalem at the time a persecution in which James, the brother of John, was martyred, and Peter was m prison, and James seems to have been the only apostle present (Acts 12:17); so it was needless to mention this visit, seeing that he could not at such a time have received the instructions which the Galatians alleged he had derived from the primary fountains of authority, the apostles.