Now in those days Luke 3:1. And in the fifteenth year It could not be gathered from Matthew and Mark in what year of his age John began to preach: but Luke shows sufficiently, that he was about thirty years of age. The ancient writers of the Church are almost unanimously agreed, that he was born fifteen years before the death of Augustus. His successor Tiberius had held the government of the Roman Empire for fifteen years, when the same John began to preach. In this way are made up the thirty years which I have mentioned. Hence it follows, that he did not long discharge the office of teacher, but, in a short time, gave way to Christ; for we shall soon find, that Christ also was baptized in the thirtieth year of his age, when he was immediately installed into the discharge of his public office. Now as John, the morning-star, or dawn, was immediately followed by Christ, "the Sun of Righteousness," (Malachi 4:2,) there is no reason to wonder, that John disappeared, in order that Christ might shine alone in greater brightness.

In those days - The days here referred to cannot be those mentioned in the preceding chapter, for John was but six months older than Christ. Perhaps Matthew intended to embrace in his narrative the whole time that Jesus lived at Nazareth; and the meaning is, "in those days while Jesus still dwelt at Nazareth," John began to preach. It is not probable that John began to baptize or preach long before the Saviour entered on his ministry; and, consequently, from the time that is mentioned in the close of the second chapter to that mentioned in the beginning of the third, an interval of twenty-five years or more elapsed.
John the Baptist - Or John the baptizer - so called from his principal office, that of baptizing. Baptism, or the application of water, was a rite well known to the Jews, and practiced when they admitted proselytes to their religion from paganism. - Lightfoot.
Preaching - The word rendered "preach" means to proclaim in the manner of a public crier; to make proclamation. The discourses recorded in the New Testament are mostly brief, sometimes consisting only of a single sentence. They were public proclamations of some great truth. Such appear to have been the discourses of John, calling people to repentance.
In the wilderness of Judea - This country was situated along the Jordan and the Dead Sea, to the east of Jerusalem. The word translated "wilderness" does not denote, as with us, a place of boundless forests, entirely destitute of inhabitants; but a mountainous, rough, and thinly settled country, covered to some considerable extent with forests and rocks, and better suited for pasture than for tilling. There were inhabitants in those places, and even villages, but they were the comparatively unsettled portions of the country, 1-Samuel 25:1-2. In the time of Joshua there were six cities in what was then called a wilderness, Joshua 15:61-62.

John the Baptist - John, surnamed The Baptist, because he required those to be baptized who professed to be contrite because of their sins, was the son of a priest named Zacharias, and his wife Elisabeth, and was born about A. M. 3999, and about six months before our blessed Lord. Of his almost miraculous conception and birth, we have a circumstantial account in the Gospel of Luke, chap. 1: to which, and the notes there, the reader is requested to refer. For his fidelity in reproving Herod for his incest with his brother Philip's wife, he was cast into prison, no doubt at the suggestion of Herodias, the profligate woman in question. He was at last beheaded at her instigation, and his head given as a present to Salome, her daughter, who, by her elegant dancing, had highly gratified Herod, the paramour of her incestuous mother. His ministry was short; for he appears to have been put to death in the 27th or 28th year of the Christian era.
Came - preaching - Κηρυσσων, proclaiming, as a herald, a matter of great and solemn importance to men; the subject not his own, nor of himself, but from that God from whom alone he had received his commission. See on the nature and importance of the herald's office, at the end of this chapter. Κηρυσσειν, says Rosenmuller, de iis dicitur, qui in Plateis, in Campis, in Aere aperto, ut a multis audiantur, vocem tollunt, etc. "The verb κηρυσσειν is applied to those who, in the streets, fields, and open air, lift up their voice, that they may be heard by many, and proclaim what has been committed to them by regal or public authority; as the Kerukes among the Greeks, and the Precones among the Romans."
The wilderness of Judea - That is, the country parts, as distinguished from the city; for in this sense the word wilderness, מדבר midbar or מדבריות midbarioth, is used among the rabbins. John's manner of life gives no countenance to the eremite or hermit's life, so strongly recommended and applauded by the Roman Church.

In (a) those days came (1) John the Baptist, preaching in the (b) wilderness of Judaea,
(a) Not when Joseph went to dwell at Nazareth, but a great while after, about fifteen years: for in the 30th year of his life Jesus was baptized by John: therefore "those days" means the time when Jesus remained as an inhabitant of the town of Nazareth. (1) John, who through his singular holiness and rare austerity of life caused men to cast their eyes on him, prepares the way for Christ who is following fast on his heels, as the prophet Isaiah foretold, and delivers the sum of the gospel, which a short time later would be delivered more fully.
(b) In a hilly country, which was nonetheless inhabited, for Zacharias dwelt there, (Luke 1:39-40), and there was Joab's house, (1-Kings 2:34); and besides these, Joshua makes mention of six towns that were in the wilderness, (Joshua 15:61-62).

In those days came John the Baptist,.... The Evangelist having given an account of the genealogy and birth of Christ; of the coming of the wise men from the east to him; of his preservation from Herod's bloody design against him, when all the infants at Bethlehem were slain; of the flight of Joseph with Mary and Jesus into Egypt, and of their return from thence, and settlement in Nazareth, where Christ continued till near the time of his baptism, and entrance on his public ministry; proceeds to give a brief relation of John, the harbinger and forerunner of Christ, and the administrator of baptism to him: and he describes him by his name John, in Hebrew "Jochanan", which signifies "gracious", or "the grace of the Lord", or "the Lord has given grace"; which agrees with him, both as a good man, on whom the Lord had bestowed much grace, and as a preacher, whose business it was to publish the grace of God in Christ, Luke 16:16. This name was given him by an angel before his conception, and by his parents at his birth, contrary to the mind of their relations and neighbours, Luke 1:13. He is called by some of the Jewish writers (m), John the "high priest"; his father Zacharias was a priest of the course of Abia, and he might succeed him therein, and be the head of that course, and for that reason be called a "high" or "chief priest"; as we find such were called, who were the principal among the priests, as were those who were chosen into the sanhedrim, or were the heads of these courses; and therefore we read of many chief priests, Matthew 2:4. From his being the first administrator of the ordinance of baptism, he is called John the Baptist; and this was a well known title and character of him. Josephus (n) calls him "John", who is surnamed , "the Baptist"; and Ben Gorion having spoken of him, says (o), this is that John who , "made", instituted, or practised "baptism"; and which, by the way, shows that this was not in use among the Jews before, but that John was the first practiser this way. He is described by his work and office as a preacher, he "came" or "was preaching" the doctrines of repentance and baptism; he published and declared that the kingdom of the Messiah was at hand, that he would quickly be revealed; and exhorted the people to believe on him, which should come after him. The place where he preached is mentioned,
in the wilderness of Judea; not that he preached to trees and to the wild beasts of the desert; for the wilderness of Judea was an habitable place, and had in it many cities, towns, and villages, in which we must suppose John came preaching, at least to persons which came out from thence. There were in Joshua's time six cities in this wilderness, namely Betharabah, Middin, and Secacah, and Nibshan, and the city of Salt, and Engedi, Joshua 15:61. Mention is made in the Talmud (p) of this wilderness of Judea, as distinct from the land of Israel, when the doctors say, that
"they do not bring up small cattle in the land of Israel, but they bring them up , "in the wilderness which is in Judea".''
The Jews have an observation (q) of many things coming from the wilderness;
"the law, they say, came from the wilderness; the tabernacle from the wilderness; the sanhedrim from the wilderness; the priesthood from the wilderness; the office of the Levites from the wilderness; the kingdom from the wilderness; and all the good gifts which God gave to Israel were from the wilderness.''
So John came preaching here, and Christ was tempted here. The time of his appearance and preaching was in those days: not when Christ was newly born; or when the wise men paid their adoration to him; or when Herod slew the infants; or when he was just dead, and Archelaus reigned in his room; or when Christ first went to Nazareth; though it was whilst he dwelt there as a private person; but when John was about thirty years of age, and Christ was near unto it, Luke 3:23 an age in which ecclesiastical persons entered into service, Numbers 4:3. It was indeed, as Luke says, Luke 3:1 in the "fifteenth" year of the reign of Tiberius Caesar; Pontius Pilate being governor of Judea; and Herod being tetrarch of Galilee; and his brother Philip tetrarch of Iturea; and of the region of Trachonitis; and Lysanias, the tetrarch of Abilene; Annas and Caiaphas being the high priests.
(m) Ganz. Tzemach David, par. 1. fol. 25. 2. Chronicon Regum, fol. 54. 4. (n) Antiq. l. 18. c. 7. (o) L. 5. c. 45. (p) T. Bab. Bava Kama, fol, 79. 9. 2. (q) Shirhashirim Rabba, fol. 13. 3.

After Malachi there was no prophet until John the Baptist came. He appeared first in the wilderness of Judea. This was not an uninhabited desert, but a part of the country not thickly peopled, nor much enclosed. No place is so remote as to shut us out from the visits of Divine grace. The doctrine he preached was repentance; "Repent ye." The word here used, implies a total alteration in the mind, a change in the judgment, disposition, and affections, another and a better bias of the soul. Consider your ways, change your minds: you have thought amiss; think again, and think aright. True penitents have other thoughts of God and Christ, sin and holiness, of this world and the other, than they had. The change of the mind produces a change of the way. That is gospel repentance, which flows from a sight of Christ, from a sense of his love, and from hopes of pardon and forgiveness through him. It is a great encouragement to us to repent; repent, for your sins shall be pardoned upon your repentance. Return to God in a way of duty, and he will, through Christ, return unto you in the way of mercy. It is still as necessary to repent and humble ourselves, to prepare the way of the Lord, as it then was. There is a great deal to be done, to make way for Christ into a soul, and nothing is more needful than the discovery of sin, and a conviction that we cannot be saved by our own righteousness. The way of sin and Satan is a crooked way; but to prepare a way for Christ, the paths must be made straight, Hebrews 12:13. Those whose business it is to call others to mourn for sin, and to mortify it, ought themselves to live a serious life, a life of self-denial, and contempt of the world. By giving others this example, John made way for Christ. Many came to John's baptism, but few kept to the profession they made. There may be many forward hearers, where there are few true believers. Curiosity, and love for novelty and variety, may bring many to attend on good preaching, and to be affected for a while, who never are subject to the power of it. Those who received John's doctrine, testified their repentance by confessing their sins. Those only are ready to receive Jesus Christ as their righteousness, who are brought with sorrow and shame to own their guilt. The benefits of the kingdom of heaven, now at hand, were thereupon sealed to them by baptism. John washed them with water, in token that God would cleanse them from all their iniquities, thereby intimating, that by nature and practice all were polluted, and could not be admitted among the people of God, unless washed from their sins in the fountain Christ was to open, Zac 13:1.

PREACHING AND MINISTRY OF JOHN. ( = Mark 1:1-8; Luke 3:1-18). (Matthew 3:1-12)
In those days--of Christ's secluded life at Nazareth, where the last chapter left Him.
came John the Baptist, preaching--about six months before his Master.
in the wilderness of Judea--the desert valley of the Jordan, thinly peopled and bare in pasture, a little north of Jerusalem.

In those days. Many years after the incidents of the last chapter; somewhere from twenty-five to thirty.
Came John the Baptist. Called the Baptist or Baptizer because he baptized the people. He came forth as a preacher and reformer. He was the subject of prophecy (Isaiah 40:3; Malachi 3:1); his birth was announced by an angel; he was of a priestly family, the son of Zacharias and Elizabeth, the cousin of Mary. He was now about thirty years old.
Preaching in the wilderness of Judea. A region thinly inhabited, used mostly for pasture, a rocky tract in the eastern part of Judea and west of the Jordan and the Dead Sea.

In those days - that is, while Jesus dwelt there. In the wilderness of Judea - This was a wilderness properly so called, a wild, barren, desolate place as was that also where our Lord was tempted. But, generally speaking, a wilderness in the New Testament means only a common, or less cultivated place, in opposition to pasture and arable land. Mark 1:1; Luke 3:1.