Then touched he their eyes, saying, According to your faith be it unto you.

People's New Testament

9:29 According to your faith be it to you. Faith is the hand which takes what God offers, the spiritual organ of appropriation.

Jamieson-Fausset-Brown Bible Commentary

29. Then touched he their eyes, saying, According to your faith be it unto you-not, Receive a cure proportioned to your faith, but, Receive this cure as granted to your faith. Thus would they carry about with them, in their restored vision, a gracious seal of the faith which drew it from their compassionate Lord.

Matthew Henry's Concise Commentary

9:27-31 At this time the Jews expected Messiah would appear; these blind men knew and proclaimed in the streets of Capernaum that he was come, and that Jesus was he. Those who, by the providence of God, have lost their bodily sight, may, by the grace of God, have the eyes of their understanding fully enlightened. And whatever our wants and burdens are, we need no more for supply and support, than to share in the mercy of our Lord Jesus. In Christ is enough for all. They followed him crying aloud. He would try their faith, and would teach us always to pray, and not to faint, though the answer does not come at once. They followed Christ, and followed him crying; but the great question is, Do ye believe? Nature may make us earnest, but it is only grace that can work faith. Christ touched their eyes. He gives sight to blind souls by the power of his grace going with his word, and he puts the cure upon their faith. Those who apply to Jesus Christ, shall be dealt with, not according to their fancies, nor according to their profession, but according to their faith. Christ sometimes concealed his miracles, because he would not indulge the conceit which prevailed among the Jews, that their Messiah should be a temporal prince, and so give occasion to the people to attempt tumults and seditions.