(I’m Syriac Orthodox, but I’ve been studying Reformed theology a bit more seriously lately.)
I speak as a student…
Consider the nature of John’s baptism. As proclaimed in the Gospels, it was “a baptism of repentance for the forgiveness of sins" administered to Israel as a prep sign under the ot, calling sinners to turn from their wickedness and most importantnly, the anticipation of Messiah’s kingdom..
In this it forshadowed the fuller sacrament of Christian baptism instituted by Christ, which signifies our union with Him in His death, burial and resurrection, as seen in Rom 6:3-4. For fallen humanity, that is totally depraved and utterly unable to save oursevles, as Calvin writes in his Insituites, that baptism outwardly testifies to the inward work of the Spirit, sealing God’s promise to wash away our guilt through faith in Christ’s atoning blood. But our Lord, being impeccable in His divine-human nature, required no such personal cleaning, and i feel, that the Baptism of Christ, was not for Christ’s sake, but for ours, fulfilling the eternal decree of the Triune God in the economy of redemption.
The key here is in our Lord’s own words, Hw said to John, “Let it be so now, for thys it is fitting for us to fulfill all righteouness". Here, in the sovereign wisdom of God, we behold CHrist’s active obediences, a cornerstone of Reformed soteriology.
As the Second Adam, Jesus came not merely to atone for our sins through His passive suffering on the cross but to render perfect obedience to the Father’s law on our behalf, imputing His righteousness to the elect (Romas 5:19; 2 Cor 5:21). By submitting to baptism, He identified Himself with sinful humanity, standing in solidarity with those He came to redeem, though sinless, He humbled Himself to the point of assuming the form of servant, voluntarily placing Himself under the sign of repentance as our federal head and subsitute. In this act, He consecrated the waters of baptism, rendering them as means of grace for His people, much as He sanctified the Lord’s Supper by His own participation in the Passover…
John Calvin says, in his commentary on Matthew, “Christ did not come to baptism as a private person, but as the Head of the whole Church, that He might wash away our sins in His own body..” thus, His baptism was an act of vicarious fulfillemnt, whereby He obyed every jot of the divine will, earning for us, who could never merit it.
Moreover, it gave a glorious inaugration of Christ’s public ministry, revealing the Trinity’s eternal counsel in salvation. As Christ’ emerged from the waters, the heavens opened, the Spirit descended like a dove (which symbolize the anoiting for His prophetic, priestly, and kingly office, Isa 11:2, 42:1, 61:1), and the Father’s voice thundered, “This is my beloved Son, with whom I am well pleased”, we see here the covenant of redemption unveiled, the Son, eternally elected as Mediator steps forth to accomplist the work ordained before the foundation of the world. His baptism prefigures the NT, transitioning from John’s preparatory rite to the fuller sign of grace in the church, where water signifies not merely repentance, but the outpouring of the Spirit upon the elect. It is no mere example for us to imitate, though we are called to follow Him, but rather a dviine act that grounds the efficacy of our own baptism. Without Christ’s submission, our sacraments would be empty forms, but through Him, they are effectual signs, applied by the Spirit to those predestined unto Life…
I say, Praise be to God, Praise be to God, Praise be to God, Why did the sinless One need baptism?…
He didn’t need it for Himself, but in the unsearchable depths of divine grace, he willed it to magnify Hus glory and secure our salvation…
Baptism is a sign and seal of ingrafting into Christ.