See the notes at Matthew 3:11-12.

On these verses see Matthew 3:11, Matthew 3:12, and Mark 1:7, Mark 1:8, and particularly the note on John 3:5 (note).

John answered, saying unto them all,.... For some of them might not only so think in their hearts, but express with their mouths the apprehension they had of him; and might put the question to him, as the priests and Levites from Jerusalem afterwards did; or he might know the secret thoughts of their hearts by divine revelation; or be apprized by his disciples of the private sentiments of the people concerning him: and therefore, to put them out of doubt, and that he might not have an honour conferred on him, which did not belong to him, he addressed himself, in a very public manner, to the whole multitude, in the hearing of them all: though the word "all" is left out in the Syriac and Persic versions, but rightly retained in others, being in all copies, and having a considerable emphasis on it: and said the following words.

I indeed baptize you with water; Matthew adds "unto repentance"; upon the profession of repentance:

but one mightier than I cometh; that is,

after me; as Matthew records it:

the latchet of whose shoes I am not worthy to unloose; neither to bear his shoes after him, as Matthew says, nor to untie his shoe string, or unbuckle his shoe, both which were menial actions with the Jews: he shall baptize you with the Holy Ghost, and with fire; as he did some of their nation, his own disciples, on the day of pentecost; See Gill on Matthew 3:11

One mightier (ὁ ἰσχυρότερος)

The definite article points to an expected personage. Hence better as Rev., he that is mightier.

Unloose (λῦσαι)

So also Mark; but Matthew βαστάσαι, to bear. See on Matthew 3:11.

John answered, saying unto them all, I indeed baptize you with water; but one mightier than I cometh, the latchet of whose shoes I am not worthy to unloose: he shall baptize you with the Holy Ghost and with fire:

16. John answered-either to the deputation from Jerusalem (see Joh 1:19, &c.), or on some other occasion, simply to remove impressions derogatory to his blessed Master which he knew to be taking hold of the popular mind. (Also see on [1556]Mt 3:10.)

saying unto them all-in solemn protestation. So far from entertaining such a thought as laying claim to the honors of Messiahship, the meanest services I can render to that "Mightier than I that is coming after me," are too high an honor for me. Beautiful spirit, distinguishing this servant of Christ throughout!

one mightier than I-"the Mighter than I."

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.