Matthew 3:11

Verse 11. My baptism is only calculated to lead you to a penitential life, and not to give you true justice; but he who comes after me, is stronger than I, and whose shoes I am not worthy to carry: (it was customary with the attendant slave to carry a change of shoes for his master) he will baptize you in the Holy Ghost, and in the fire of his divine charity, which he will infuse into your hearts, to purify you from all your sins. V.—Here Saint John tacitly insinuates the divinity of Jesus Christ. He acknowledges his unworthiness, and it is this his humility that makes him the more acceptable to God, “I ought to be baptized by thee, and comest thou to me?” Tirinus.—Whose shoes I am not worthy to carry. In Saint Mark, (chapter 1:7) and in Saint Luke, (3:21) we read, the latchet of whose shoes … I am not worthy to untie. The sense is the same, and Saint John might use both these expressions. His meaning is, that he was not worthy to do him the least, or the lowest service.—He shall baptize you in, or with the Holy Ghost, that is by his baptism, he will give you the remission of your sins, and the graces of the Holy Ghost, signified also by fire, which may allude to the coming of the Holy Ghost at Pentecost, in the shape of fiery tongues. Witham.

TR and NU add “and with fire”