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:
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).