Mark 1:4

And he came into all the region of Jordan, preaching the baptism of repentance for the remission of sins. It is clear to all readers that John not only preached the baptism of repentance, but also gave it to some, yet nevertheless he was not able to give his baptism for the remission of sins. For the remission of sins is granted to us only in the baptism of Christ. Therefore it must be noted what is said: Preaching the baptism of repentance for the remission of sins, because the baptism that would loose sins, since he was not able to give it, he preached: so that just as he preceded the incarnate Word of the Father with the word of preaching, so he might precede the baptism of repentance, by which sins are loosed, with his own baptism, by which sins cannot be loosed; so that because his speech preceded the presence of the Redeemer, his baptism also by preceding might become a shadow of the truth.

John's baptism did not have the remission of sins, but introduced only repentance for the people. But how then does Mark say here: "for the forgiveness of sins"? To this we answer that John preached the baptism of repentance. And to what did this preaching …

(in Marc. i. 2) It is evident that John not only preached, but also gave to some the baptism of repentance; but he could not give baptism for the remission of sinsc. For remission of sins is only given to us by the baptism of Christ. It is therefore only said, Preaching the baptism of repentance for the remission of sins; for he preached a baptism which could remit sins, since he could not give it. Wherefore as he was the forerunner of the Incarnate Word of the Father, by the word of his preaching, so by his baptism, which could not remit sins, he preceded that baptism, of penitence, by which sins are remitted.

According to the above-mentioned prophecy of Isaiah, the way of the Lord is prepared by John, through faith, baptism, and penitence; the paths are made straight by the rough marks of the hair-cloth garment, the girdle of skin, the feeding on locusts and wild honey, and the most lowly voice; whence it is said, John was in the wilderness. For John and Jesus seek what is lost in the wilderness; where the devil conquered, there he is conquered; where man fell, there he rises up. But the name John means the grace of God, and the narrative begins with grace. For it goes on to say, baptizing. For by baptism grace is given, seeing that by baptism sins are freely remitted. But what is brought to perfection by the bridegroom, is introduced by the friend of the bridegroom. Thus catechumens, (which word means persons instructed,) begin by the ministry of the priest, receive the chrismb from the bishop. And to show this, it is subjoined, And preaching the baptism of repentance, &c.

John was baptizing in the desert, etc. It is known by all peoples that John not only preached the baptism of repentance but also administered it to some, yet he could not grant baptism for the remission of sins. For the remission of sins is …

The baptism of John had not remission of sins, but only brought men to penitence. He preached therefore the baptism of repentance, that is, he preached that to which the baptism of penitence led, namely, remission of sins, that they who in penitence received Christ, might receive Him to the remission of their sins.

John did baptize in the wilderness,.... Of Judea, Mat 3:1, where he first appeared as a preacher; and is the same wilderness Isaiah has respect to in the above prophecy, Isa 40:

John - The original name is nearly lost in the Greek Ιωαννης, and in the Latin Johannes, and almost totally so in the English John. The original name is יהוחנן Yehochanan, compounded of יהוה חנן Yehovah chanan, the grace or mercy of Jehovah: a most proper and significant name for the forerunner of the God of All Grace. It was John’s business to proclaim the Gospel of the grace of God, and to point out that Lamb or sacrifice of God which takes away the sin of the world.

The Gospel of Mark, which we now begin, is in some respects unlike the other three Gospels. It tells us nothing about the birth and early life of our Lord Jesus Christ. It contains comparatively few of His sayings and discourses. Of all the four inspired histories of our Lord's earthly ministry, this is by far the shortest. But we must not allow these peculiarities to make us undervalue Mark's Gospel. It is a Gospel singularly full of precious facts about the Lord Jesus, narrated in a simple, terse, pithy, and condensed style.

The Gospel of Mark, which we now begin, is in some respects unlike the other three Gospels. It tells us nothing about the birth and early life of our Lord Jesus Christ. It contains comparatively few of His sayings and discourses. Of all the four inspired histories of our Lord's earthly ministry, this is by far the shortest. But we must not allow these peculiarities to make us undervalue Mark's Gospel. It is a Gospel singularly full of precious facts about the Lord Jesus, narrated in a simple, terse, pithy, and condensed style. If it tells us few of our Lord's SAYINGS, it is eminently rich in its catalogue of His DOINGS. It often contains minute historical detail of deep interest, which are wholly omitted in Matthew, Luke and John. In short, it is no mere abridged copy of Matthew, as some have rashly asserted, but the independent narrative of an independent witness, who was inspired to write a history of our Lord's WORKS , rather than of His WORDS . Let us read it with holy reverence. Like all the rest of Scripture, every word of Mark is "given by inspiration of God," and every word is "profitable." Let us observe, in these verses, what a full declaration we have of the dignity of our Lord Jesus Christ's person. The very first sentence speaks of Him as "the Son of God." These words, "the Son of God," conveyed far more to Jewish minds than they do to ours. They were nothing less than an assertion of our Lord's divinity. They were a declaration that Jesus was Himself very God, and "equal with God." (John 5:18.) There is a beautiful fitness in placing this truth in the very beginning of a Gospel. The divinity of Christ is the citadel and keep of Christianity. Here lies the infinite value of the atoning sacrifice He made upon the cross. Here lies the peculiar merit of His atoning death for sinners.

See the notes at Mat 3:3, Mat 3:5-6, Mat 3:11.