Mark 1:2 Commentary - Whedon's Commentary on the Old and New Testaments
2. As it is written The second and third verses, by a strong inversion, should come after the fourth: “John did baptize… as it is written,” etc. The prophecy is quoted from Isa 40:3, and Mal 3:1. As we have explained in the corresponding passage in Matthew, the quotation is a prophecy concerning John, the harbinger of the Messiah Jesus. I send my messenger This I in the prophet is spoken by Jehovah. But this Jehovah is the Messiah. So that we have here a true Jehovah-Jesus.
Consult other comments:
Mark 1:2 - Abbott's Illustrated New Testament
Mark 1:2 - The Greek Testament
Mark 1:2 - Albert Barnes' Notes on the Bible
Mark 1:2 - Expository Notes with Practical Observations on the New Testament
Mark 1:2 - The Cambridge Bible for Schools and Colleges
Mark 1:2 - Adam Clarke's Commentary and Critical Notes on the Bible
Mark 1:2 - Companion Bible Notes, Appendices and Graphics
Mark 1:2 - Expository Notes of Dr. Constable (Old and New Testaments)
Mark 1:2 - Mr. D's Notes on Selected New Testament Books by Stanley Derickson
Mark 1:2 - Ellicott's Commentary for English Readers (Old and New Testaments)
Mark 1:2 - The Expositor’s Greek Testament by Robertson
Mark 1:2 - Garner-Howes Baptist Commentary
Mark 1:2 - John Gill's Exposition of the Entire Bible
Mark 1:2 - Gnomon of the New Testament
Mark 1:2 - William Godbey's Commentary on the New Testament
Mark 1:2 - Henry Alford's Greek Testament
Mark 1:2 - Biblical Illustrator Edited by Joseph S. Exell
Mark 1:2 - Jamieson, Fausset and Brown's Commentary Critical and Explanatory on the Whole Bible
Mark 1:2 - The Gospel According to St. Mark: A Devotional Commentary
Mark 1:2 - The Popular Commentary on the Bible by Kretzmann
Mark 1:2 - Lightfoot Commentary Gospels
Mark 1:2 - Expositions Of Holy Scripture by Alexander MacLaren
Mark 1:2 - Commentary Series on the Bible by Peter Pett
Mark 1:2 - English Annotations on the Holy Bible by Matthew Poole
Mark 1:2 - Robertson's Word Pictures in the New Testament
Mark 1:2 - A Popular Commentary on the New Testament
Mark 1:2 - John Trapp's Complete Commentary (Old and New Testaments)
Mark 1:2 - The Treasury of Scripture Knowledge
Mark 1:2 - You Can Understand the Bible: Study Guide Commentary Series by Bob Utley
Mark 1:2 - Whedon's Commentary on the Old and New Testaments
Whedon's Commentary on the Old and New Testaments

Daniel D. Whedon (1808-1885) was a prominent university professor, theologian, and author. He served as Professor of Ancient Languages at Wesleyan University in Connecticut; as Professor of Rhetoric at the University of Michigan; and as editor of the Methodist Quarterly Review from 1856 to1884. He authored numerous books including Commentary on the New Testament (New York: Carlton & Porter, 1860); Commentary on the Old Testament (New York: Nelson & Phillips, 1873); What is Arminianism? (Toronto: W. Briggs, 1879); and Essays, Reviews, and Discourses (New York: Phillips & Hunt, 1887).