| Gill's Exposition of the Entire Bible And many other thing's,.... Relating to the person and office of the Messiah, to the nature of his kingdom, the Gospel dispensation, and to faith in him; for he pointed him out to the people, and exhorted them to believe in him, and expressed much joy and pleasure on the hearing of his success and increase; and these, with others beside, in his "exhortation", or whilst he was exhorting, or "comforting", preached he unto the people: publishing the Gospel, the good news, and glad tidings of the Messiah's being come, and of life, righteousness, and salvation by him.
Vincent's Word StudiesOther (ἕτερα) Rather, various, different. Preached (εὐηγγελίζετο) Rev. preserves the fuller meaning of the word according to its etymology: preached good tidings. See on Gospel, Superscription of Matthew.
Geneva Study BibleAnd many other things in his exhortation preached he unto the people.
Jamieson-Fausset-Brown Bible Commentary18. many other things, &c.-such as we read in Joh 1:29, 33, 34; 3:27-36. (Also see on [1557]Mt 3:12.)
Matthew Henry's Concise Commentary3:15-20 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. | 
