Luke 9:35 → Isaiah 42:1

Luke's Transfiguration voice differs from Mark's and Matthew's at one decisive word: "This is My Son, whom I have chosen. Listen to Him!" (Luke 9:35). Where Mark and Matthew read "beloved," Luke has ὁ ἐκλελεγμένος — "the Chosen One," the perfect participle of ἐκλέγομαι — the cognate of LXX Isaiah 42:1's Servant title ὁ ἐκλεκτός μου (rendering Hebrew bəḥîrî, "my chosen"): "Here is My Servant, whom I uphold, My Chosen One, in whom My soul delights. I will put My Spirit on Him." Luke alone among the Transfiguration accounts carries the Servant strand into the Father's declaration (Matthew carries the same Song's delight-clause instead, "in whom I am well pleased"), so the utterance is layered from three OT texts, not two: royal sonship (Ps 2:7), Mosaic-prophet authorization (Deut 18:15), and Servant election (Isa 42:1). The Servant strand is what gives the scene its direction. The Father authorizes the Prophet as the Chosen Servant — the figure whose vocation runs through rejection and suffering to justice for the nations — and Luke has placed the scene immediately after the first passion prediction (9:22), so that "Listen to Him" means listen to the One who has just said He must suffer. Luke then closes the arc at the cross, where the rulers sneer in the same title: "let Him save Himself if He is the Christ of God, the Chosen One" (Luke 23:35) — the election the Father declared on the mountain is the very thing mocked on the tree, and it holds in both places. This is also the thread Stephen picks up at Acts 7:37: Israel always rejects its prophets, and the climactic Prophet is the chosen, rejected Servant. This pair scopes the Isa 42:1 Servant strand of the composite utterance; the listen-to-him strand belongs to Luke 9:35 → Deut 18:15 (and cf. the baptismal parallel, Luke 3:22 → Isa 42:1). The telos: "Chosen One" is delight-language — "in whom My soul delights" — so the Father is not merely appointing a sufferer but disclosing the One His own soul savors; to behold the transfigured Servant is to see that the road to the cross is walked by the Father's treasure, and to be invited into that same delight.