¹ sn Travel through Samaria was not geographically necessary; the normal route for Jews ran up the east side of the Jordan River (Transjordan). Although some take the impersonal verb had to (δεῖ, dei) here to indicate logical necessity only, normally in John’s Gospel its use involves God’s will or plan (3:7, 3:14, 3:30, 4:4, 4:20, 4:24, 9:4, 10:16, 12:34, 20:9).

² sn Samaria. The Samaritans were descendants of 2 groups: (1) The remnant of native Israelites who were not deported after the fall of the Northern Kingdom in 722 b.c.; (2) Foreign colonists brought in from Babylonia and Media by the Assyrian conquerors to settle the land with inhabitants who would be loyal to Assyria. There was theological opposition between the Samaritans and the Jews because the former refused to worship in Jerusalem. After the exile the Samaritans put obstacles in the way of the Jewish restoration of Jerusalem, and in the 2nd century b.c. the Samaritans helped the Syrians in their wars against the Jews. In 128 b.c. the Jewish high priest retaliated and burned the Samaritan temple on Mount Gerizim.

³ tn “But” is not in the Greek text, but has been supplied to indicate the implied contrast between the Mosaic law and grace through Jesus Christ. John 1:17 seems to indicate clearly that the Old Covenant (Sinai) was being contrasted with the New. In Jewish sources the Law was regarded as a gift from God (Josephus, Ant. 3.8.10 [3.223]; Pirqe Avot 1.1; Sifre Deut 31:4 §305). Further information can be found in T. F. Glasson, Moses in the Fourth Gospel (SBT).