ὁρῶντα: the blind man's words will be instinct with mental vision. (Cp. O.T. 747.) The insight is ascribed to the words themselves, not to the speaker, as at 267 πεπονθότα and δεδρακότα are epithets of the ἔργα, not of the agent. Cp. Aesch. Cho. 854 “φρέν̓...ὠμματωμένην”, Suppl. 467 “ὠμμάτωσα...σαφέστερον” (λόγον).
“So much the rather thou, Celestial Light,
Shine inward, and the mind through all her powers
Irradiate; there plant eyes.
”Milton, Par. Lost. 3. 51