Commentaries:
Barnes' Notes
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, I Samuel 25:1-2. In the time of Joshua there were six cities in what was then called a wilderness, Joshua 15:61-62.
Other commentary entries containing this verse:
Joshua 15:21-63
Job 24:5
Psalms 65:12
Isaiah 40:3
Matthew 4:1
Matthew 4:23
John 11:54
Acts 21:38
Hebrews 3:8
Hebrews 11:38
1 Peter 3:19
1 John 5:6
Revelation 12:6
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