Matthew 3:17

This most solemn testimony of God the Father, relative to his own beloved Son, is repeated below in chap. xvii; and is of such great moment, that the Holy Ghost would have it repeated not only by three evangelists, Matthew, Mark and Luke, but also by St. Peter, as a fourth evangelist, 2nd Peter chap. i. (Tirinus) — In Greek, the emphatic article o uios mou o agapetos, strengthens the proof that Jesus Christ, upon whom the Spirit of God descended in the shape of a dove, was not the adoptive, but natural Son of God, born of Him before all ages, and should silence every blasphemous tongue and pen that can attempt to rob Jesus Christ of his divinity, and poor man of all hopes of salvation, through this God-man, Christ the Lord. But if it here be asked, why Jesus Christ, who was innocence itself, yes, and the very essence of sanctity, condescended so far as to be baptized with sinners, we answer, with the Holy Fathers, that it was, 1. to sanction the baptism and ministry of his precursor; 2. not to lose this opportunity of teaching humility, by placing himself among sinners, as if he had stood in need of the baptism of penance for the remission of sins; and lastly, with St. Ambrose, that it was to sanctify the waters, and to give to them the virtue of cleansing men from their sins by the laver of baptism. (Haydock)

Verses 13-17 Christ's gracious condescensions are so surprising, that even the strongest believers at first can hardly believe them; so deep and mysterious, that even those who know his mind well, are apt to start objections against the will of Christ. And those who have much of the Spirit of God while here, see that they need to apply to Christ for more. Christ does not deny that John had need to be baptized of him, yet declares he will now be baptized of John. Christ is now in a state of humiliation. Our Lord Jesus looked upon it as well becoming him to fulfil all righteousness, to own every Divine institution, and to show his readiness to comply with all God's righteous precepts. In and through Christ, the heavens are opened to the children of men. This descent of the Spirit upon Christ, showed that he was endued with his sacred influences without measure. The fruit of the Spirit is love, joy, peace, long-suffering, gentleness, goodness, faith, meekness, temperance. At Christ's baptism there was a manifestation of the three Persons in the sacred Trinity. The Father confirming the Son to be Mediator; the Son solemnly entering upon the work; the Holy Spirit descending on him, to be through his mediation communicated to his people. In Him our spiritual sacrifices are acceptable, for He is the altar that ( 1 Peter. 2:5 ) consuming fire, but in Christ, a reconciled Father. This is the sum of the gospel, which we must by faith cheerfully embrace.