Then Philip - One of the seven deacons, Acts 6:5, called afterwards, Philip the Evangelist, Acts 21:8.

The city of Samaria - At this time there was no city of Samaria existing: according to Josephus, Ant. lib. xiii. cap. 10, sect. 3, Hyrcanus had so utterly demolished it as to leave no vestige of it remaining. Herod the Great did afterwards build a city on the same spot of ground; but he called it ΣεβαϚη i.e. Augusta, in compliment to the Emperor Augustus, as Josephus tells us, Ant. lib. xv. cap. 8, sect. 5; War, lib. i. cap. 2. sect. 7; and by this name of Sebast, or Augusta, that city, if meant here, would in all probability have been called, in the same manner as the town called Strato's Tower, (which Herod built on the sea coasts, and to which he gave the name of Caesarea, in compliment to Augustus Caesar), is always called Caesarea, wherever it is mentioned in the Acts of the Apostles. Bp. Pearce.

As Sychem was the very heart and seat of the Samaritan religion, and Mount Gerizim the cathedral church of that sect, it is more likely that it should be intended than any other. See Lightfoot. As the Samaritans received the same law with the Jews, as they also expected the Messiah, as Christ had preached to and converted many of that people, John 4:39-42, it was very reasonable that the earliest offers of salvation should be made to them, before any attempt was made to evangelize the Gentiles. The Samaritans, indeed, formed the connecting link between the Jews and the Gentiles; for they were a mongrel people, made up of both sorts, and holding both Jewish and Pagan rites. See the account of them on Matthew 10:5 (note).

Philip.

Acts 8:1,14,15,40 And Saul was consenting to his death. And at that time there was a great persecution against the church which was at Jerusalem...

Acts 6:5 And the saying pleased the whole multitude: and they chose Stephen, a man full of faith and of the Holy Ghost, and Philip...

Acts 21:8 And the next day we that were of Paul's company departed, and came to Caesarea: and we entered into the house of Philip the evangelist...

the city. Rather, 'to a city of Samaria,' [eis polis Samaria] for the city of Samaria had been utterly destroyed by Hyrcanus, and the city built by Herod on its site was called [Sebaste,] that is, Augusta, in honour of Augustus. Samaria comprised the tract of country formerly occupied by the tribes of Ephraim and Manasseh, west of Jordan, lying between Judea and Galilee: beginning, says Josephus, at Ginea in the great plain, and ending at the toparchy of Acrabateni.

Acts 1:8 But you shall receive power, after that the Holy Ghost is come on you: and you shall be witnesses to me both in Jerusalem...

Matthew 10:5,6 These twelve Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles...

preached.

Acts 8:35-37 Then Philip opened his mouth, and began at the same scripture, and preached to him Jesus...

Acts 5:42 And daily in the temple, and in every house, they ceased not to teach and preach Jesus Christ.

Acts 9:20 And straightway he preached Christ in the synagogues, that he is the Son of God.

Acts 17:2,3 And Paul, as his manner was, went in to them, and three sabbath days reasoned with them out of the scriptures...

John 4:25,26 The woman said to him, I know that Messias comes, which is called Christ: when he is come, he will tell us all things...

1 Corinthians 1:23 But we preach Christ crucified, to the Jews a stumbling block, and to the Greeks foolishness;

1 Corinthians 2:2 For I determined not to know any thing among you, save Jesus Christ, and him crucified.

1 Corinthians 3:11 For other foundation can no man lay than that is laid, which is Jesus Christ.

A Meeting in the Desert
'And the angel of the Lord spake unto Philip, saying, Arise, and go toward the south unto the way that goeth down from Jerusalem unto Gaza, which is desert. 27. And he arose and went: and, behold, a man of Ethiopia, an eunuch of great authority under Candace queen of the Ethiopians, who had the charge of all her treasure, and had come to Jerusalem for to worship, 28. Was returning, and sitting in his chariot, read Esaias the prophet. 29. Then the Spirit said unto Philip, Go near, and join thyself …
Alexander Maclaren—Expositions of Holy Scripture: The Acts

Whether the Imposition of the Priest's Hands is Necessary for this Sacrament?
Objection 1: It would seem that the imposition of the priest's hands is necessary for this sacrament. For it is written (Mk. 16:18): "They shall lay hands upon the sick, and they shall recover." Now sinners are sick spiritually, and obtain recovery through this sacrament. Therefore an imposition of hands should be made in this sacrament. Objection 2: Further, in this sacrament man regains the Holy Ghost Whom he had lost, wherefore it is said in the person of the penitent (Ps. 1:14): "Restore unto …
Saint Thomas Aquinas—Summa Theologica

Whether Penance is a Sacrament?
Objection 1: It would seem that Penance is not a sacrament. For Gregory [*Cf. Isidore, Etym. vi, ch. 19] says: "The sacraments are Baptism, Chrism, and the Body and Blood of Christ; which are called sacraments because under the veil of corporeal things the Divine power works out salvation in a hidden manner." But this does not happen in Penance, because therein corporeal things are not employed that, under them, the power of God may work our salvation. Therefore Penance is not a sacrament. Objection …
Saint Thomas Aquinas—Summa Theologica