God Tore Heaven Open to Get to You. Don't Sleep Through It.
The description of John's dress, nearly as unusual in John's day as it would be in ours, recollects the garb of a prophet (Zech 13:4), and particularly of the prophet Elijah, who wore “a garment of hair and a leather belt around his waist” (1 Kgs 1:8). The Hebrew of 1 Kgs 1:8 describes Elijah's clothing as a shaggy, goat-haired garment, which in Mark becomes a camel's hair robe on the Baptizer. Although offensive to some modern Western tastes, the eating of locusts fell within Jewish dietary regulations (Lev 11:22; m. Hul. 3:7) and provided a high source of protein and minerals. John's rustic dress and diet set him apart from the refined temple cult in Jerusalem and further identify him with “the desert region” (1:4). Not only does John's dress associate him with Elijah, but his fearless criticism of Herod Antipas (6:18) echoes Elijah's confrontations with King Ahab (1 Kgs 18:18). Thus, in dress, setting, and proclamation Mark associates John with Elijah, the thundering prophet who renewed God's covenant with Israel on Mt. Carmel (1 Kgs 18:30–45). The stream of crowds that visit John are thus making a pilgrimage to a figure who is a harbinger of the fulfillment of Israel's destiny.
— James R. Edwards Jr.
The quotation that follows is a mixed one, combining Exod 23:20a; Mal 3:1; and Isa 40:3. The first phrase (“Look! I am sending my messenger ahead of you”) agrees almost verbatim with the Exod 23:20a LXX, where God promises to send an angel ahead of the Israelites in the wilderness. (The Greek and Hebrew words for “angel” and “messenger” are the same: Gk: ἄγγελος; Heb: malʾāk.) The present tense “I am sending” (ἀποστέλλω) is probably a futuristic present, meaning “I will send” or “I am about to send.” In Malachi this messenger (identified as Elijah in Mal 4:6) prepares for the eschatological coming of Yahweh to purge Israel and to judge the wicked. Jesus will identify John as this eschatological Elijah in Mark 9:13. The second phrase (“who will prepare your way”) follows the Hebrew text of Mal 3:1, except that “my way” becomes “your way.” With this change Mark allows for a messianic interpretation and also implies that Jesus is the embodiment of Yahweh himself.
— Mark L. Strauss
What did Jesus see? Literally, he saw the heavens tearing apart. Then he saw the Holy Spirit in the form of a dove descending into him, as the Spirit publicly entered Jesus for full empowerment for ministry. Jesus also saw the divine poetry, for this same Spirit brooded over the waters at the beginning of creation (Genesis 1:2).
— R. Kent Hughes
The same Spirit that once hovered over the primeval waters in the beginning of time (Gen. 1:2) now descends on Jesus “to liberate the earth from the stranglehold of chaos, and a voice unheard for age upon age sounds forth, announcing a decision made long ago in the eternal council.” Many thought the end time would be like the beginning. Creation would be renewed and Paradise restored. The hovering of God's Spirit on Jesus like a dove was a sign that this new creation had begun. The beginning of the gospel is then also the beginning of a new creation. This time, however, the Spirit hovers over a human being, not over a formless void, which suggests that God intends to transform humanity.
— David E. Garland