Gregory the Great
Catena Aurea · Lukasevangelium 18
And it came to pass, that as he was come nigh unto Jericho, a certain blind man sat by the way side begging: And hearing the multitude pass by, he asked what it meant. And they told him, that Jesus of Nazareth passeth by. And he cried, saying, Jesus, thou Son of David, have mercy on me. And they which went before rebuked him, that he should hold his peace: but he cried so much the more, Thou Son of David, have mercy on me. And Jesus stood, and commanded him to be brought unto him: and when he was come near, he asked him, Saying, What wilt thou that I shall do unto thee? And he said, Lord, that I may receive my sight. And Jesus said unto him, Receive thy sight: thy faith hath saved thee. And immediately he received his sight, and followed him, glorifying God: and all the people, when they saw it, gave praise unto God.
(Hom. 2. in Ev.) Because the disciples being yet carnal were unable to receive the words of mystery, they are brought to a miracle. Before their eyes a blind man receives his sight, that by a divine work their faith might be strengthened.