John 12:41 → Isaiah 6:1

A christophany disclosed retrospectively: John's climactic comment — Isaiah "saw Jesus’ glory and spoke about Him" (12:41) — identifies the One Isaiah saw enthroned, "high and exalted" (Isaiah 6:1), as the pre-incarnate Christ. The prophet's throne-vision was a sight of the Son: the antitype was present and enthroned at the inauguration of Isaiah's office, the Spirit of Christ dwelling in the prophet he commissioned (cf. 1 Peter 1:10-12). Background = Isaiah 6 call narrative; Targum Jonathan changes "I saw the Lord" to "I saw the glory of the Lord" and "King" to "glory of the shekinah" — and the Evangelist likewise says Isaiah saw Jesus' glory (not Jesus himself directly). John's "these things" gathers both of his preceding Isaiah citations — 12:38 quoting Isaiah 53:1 and 12:40 quoting Isaiah 6:10 — so the throne-vision and the Servant's rejection stand together in a composite Isaian frame: the glory Isaiah saw belongs to the One who would be "lifted up" (52:13) yet "pierced" (53:5, 12), the Suffering Servant identified as Jesus. Like Abraham, Isaiah saw Jesus' "day" (cf. 8:58). The christophany, not the Servant identification, is the pair's load-bearing disclosure: Isaiah's whole office was service rendered to the Lord he had seen.