15 And while the people were waiting, and all men were questioning in their hearts about John, if he was the Christ or not, 16 John made answer, saying to them all, Truly, I give you baptism with water, but one is coming who is greater than I, whose shoes I am not good enough to undo: he will give you baptism with the Holy Spirit, and with fire: 17 In whose hand is the instrument with which he will make clean his grain; he will put the good grain in his store, but the waste will be burned in the fire which will never be put out. 18 And so comforting them with these and other words, he gave the good news to the people; 19 But Herod the king, because John had made a protest on account of Herodias, his brother's wife, and other evil things which Herod had done, 20 Did this most evil thing of all, and had John shut up in prison.
Matthew Henry's Commentary on Luke 3:15-20
Commentary on Luke 3:15-20
(Read Luke 3:15-20)
John the Baptist disowned being himself the Christ, but confirmed the people in their expectations of the long-promised Messiah. He could only exhort them to repent, and assure them of forgiveness upon repentance; but he could not work repentance in them, nor confer remission on them. Thus highly does it become us to speak of Christ, and thus humbly of ourselves. John can do no more than baptize with water, in token that they ought to purify and cleanse themselves; but Christ can, and will baptize with the Holy Ghost; he can give the Spirit, to cleanse and purify the heart, not only as water washes off the dirt on the outside, but as fire clears out the dross that is within, and melts down the metal, that it may be cast into a new mould. John was an affectionate preacher; he was beseeching; he pressed things home upon his hearers. He was a practical preacher; quickening them to their duty, and directing them in it. He was a popular preacher; he addressed the people, according to their capacity. He was an evangelical preacher. In all his exhortations, he directed people to Christ. When we press duty upon people, we must direct them to Christ, both for righteousness and strength. He was a copious preacher; he shunned not to declare the whole counsel of God. But a full stop was put to John's preaching when he was in the midst of his usefulness. Herod being reproved by him for many evils, shut up John in prison. Those who injure the faithful servants of God, add still greater guilt to their other sins.