Luke 3:7-17
The paragraph is heavy with judgment. John condemns his hearers as vipers trying to flee the wrath to come. The wrath of God is an important topic in both Testaments. It stresses the divine hostility to all evil.
The trees are not yet cut down. But the warning is clear. In between, John reminds his audience that repentance must be shown by the appropriate fruits. He warns them against relying on Abrahamic descent. Jews were apt to think that God would ultimately be kind to them because of Abraham’s merits if they had none of their own.
10–11. John’s teaching was rejected by Jewish leaders (7:30), but it led others to ask questions. People wanted to know what was expected of them. John’s first answer is intensely practical: people should share what they have with those who have nothing.
3:10–11. The poorest people (such as most people in Egypt, who were peasants) had only one outer tunic; by such standards, anyone with two tunics had more than necessary. “What shall we do?” occurs throughout Luke-Acts as a question about how to be saved.
3:12–13. Tax gatherers sometimes collected extra money and kept the profit; although this practice was not legal, it was difficult to prevent.
12–13. The Romans taxed people by farming out the taxing rights to the highest bidder. The successful man would pay Rome the amount he bid, but he would collect more than that to pay expenses and to give him his legitimate profit. But it was a strong temptation to levy more tax than was strictly necessary and to pocket the extra. This provoked resentment, especially among the patriotic, who in any case did not like to see Jews helping the Romans by collecting their taxes for them. A vicious circle developed: the more they overtaxed the more they were hated and the more they were hated the more they overtaxed.
Notice that John does not call on either group to leave their jobs. Rather he wants them to act uprightly in them.
15. Such activities raised in men’s minds the question whether John might perhaps be the Christ (cf. John 1:20, 25). Messianic expectations were in the air and John’s activities were such as to make people wonder whether he might be the one they were looking for.
16. But John repudiates the idea. He makes two points: he is inferior to Someone who is yet to come and his baptism is likewise inferior. This Successor, says John, is mightier than I. In sheer power he surpasses John. And when it comes to worth, John sees himself as unfit to loose the thong of his sandals.
3:15–17. On John’s messianic preaching, see comment on Matthew 3:11–12. The Old Testament prophets had declared that in the end time the righteous would be endowed with the Holy Spirit and that the wicked would be burned with fire. The Jewish people generally viewed the Holy Spirit as the Spirit of prophecy, and some circles viewed the Spirit as a force that purified God’s people from unholiness.