John Gill Bible Commentary

But their eyes were holden, &c. The Ethiopic version adds, "and were covered"; and the Arabic version renders it, "now he had veiled their eyes", ascribing it to Christ; and the Persic version renders it, "and the eyes of the disciples were shut": to me it seems, that their eyes: were held downwards; or they kept looking upon the ground as they walked, which was a posture suitable to their melancholy spirits; and there might be a peculiar influence of divine power and providence, so disposing them, that they did not look up to Christ their new fellow traveller, who walked on with them: and this was so ordered, that they should not know him; that so they might not be surprised at once, as they would have been, had they looked at him, and discerned who he was; and that they might converse the more freely with him; and that he might convince them of their stupidity and unbelief, by proper arguments.