At his inaugural throne-vision Isaiah received a commission to harden: "Make the hearts of this people calloused; deafen their ears and close their eyes... otherwise they might see... hear... understand... and turn and be healed" (6:9-10) — the three faculties of perception (heart, ears, eyes) sealed shut by prophetic preaching as a judicial act. Decades later, indicting Jerusalem's prophets and seers, Isaiah re-applies his own commission's vocabulary, now stated as an accomplished divine fact: "the LORD has poured out on you a spirit of deep sleep (ruach tardemah); He has shut your eyes, O prophets; He has covered your heads, O seers" (29:10). The same Yahweh-caused blinding of the organs of perception, with the same "lest they perceive" judicial logic, has moved from imperative-commission (ch. 6) to perfect-tense realization (ch. 29) — Isaiah's own oracle coming home upon a later generation. This is Longitudinal Theme (judicial hardening as a canon-wide motif the prophet himself advances from Deut 29 forward to Jer 5:21 and Ezek 12:2) developed along a Redemptive-Historical Progression (the commission decreed in ch. 6 now historically executed in ch. 29) — not typology, since there is no escalating type-antitype, only one prophet unfolding his own hardening-word. The road to Christ runs through Paul, who fuses this very Isaiah 29:10 with Deut 29:4 in his hardening-catena (Rom 11:8) to explain Israel's rejection of her Messiah — and through John 12:39-41, where the Lord whom Isaiah saw enthroned in the chapter 6 throne-vision is the pre-incarnate Christ. The telos: the dreadful gift of a "spirit of deep sleep" is the dark backdrop against which the opening of blind eyes becomes inexpressibly desirable — "On that day the deaf will hear the words of the scroll, and out of the deep darkness the eyes of the blind will see" (29:18), fulfilled when Christ unveils the heart (2 Cor 3:16-18). To grasp the horror of judicially shut eyes is to long for, and savor, the One who alone can open them.