Luke 18:43

From which it is clear, that he was released from a double blindness, both bodily and intellectual. For he would not have glorified Him as God, had he not truly seen Him as He is. But he also gave occasion to others to glorify God; as it follows, And all the people, when they saw it, gave praise unto God.

(Chrys. ut sup.) And thus it follows, And immediately he said. But the blind man as before his restoration he showed an earnest faith, so afterwards did he give plain tokens of his gratitude; And he followed him, glorifying God. (Chrys. ubi sup.) We may here well inquire, why Christ forbids the healed demoniac who wished to follow Him, but permits the blind man who had received his sight. There seems to be a good reason for both the one case and the other. He sends away the former as a kind of herald, to proclaim aloud by the evidence of his own state his benefactor, for it was indeed a notable miracle to see a raving madman brought to a sound mind. But the blind man He allows to follow Him, since He was going up to Jerusalem about to accomplish the high mystery of the Cross, that men having a recent report of a miracle might not suppose that He suffered so much from helplessness as from compassion.

(ubi sup.) He who sees, also follows, because the good which he understands he practises.

Not only for the gift of light obtained, but for the merit of the faith which obtained it.

And to show that our Lord did not even walk without doing good, He performed a miracle on the way, giving His disciples this example, that we should be profitable in all things, and that nothing in us should be in vain.