I have baptized you with water; but he shall baptize you with the Holy Ghost.

“(ubi sup.) Thus then John proclaims the Lord not yet as God, or the Son of God, but only as a man mightier than himself. For his ignorant hearers were not yet capable of receiving the hidden things of so great a Sacrament, that the eternal Son of God, having taken upon Him the nature of man, had been lately born into the world of a virgin; but gradually by the acknowledgment of His glorified lowliness, they were to be introduced to the belief of His Divine Eternity. To these words, however, he subjoins, as if covertly declaring that he was the true God, I baptize you with water, but he shall baptize you with the Holy Ghost. For who can doubt, that none other but God can give the grace of the Holy Ghost.”

“I indeed have baptized you with water,.... This was spoken to the baptized persons, partly to take off their dependence upon him and his baptism; and partly to direct their views to Christ, from whom the gifts and graces of the Spirit are alone to be had: but he shall baptize you with the Holy Ghost; See Gill on Mat 3:11. One copy adds, "and with fire", as there: a Jewish writer says, the holy blessed God baptizeth with fire, and the wise shall understand (p). (p) R. Menachem in Lev. viii. apud Ainsworth on Gen. xvii. 12.”

“I indeed have baptized you with water - As if he had said: This baptism is not to be rested in; it is only an emblem of that which you must receive from him who is mightier than I. It is he only who can communicate the Holy Spirit; and water baptism is nothing, but as it points out, and leads to, the baptism of the Holy Ghost. The subject of these two verses is not found in Matthew nor John; but is mentioned with some varying circumstances by Luke, Luk 3:16.”