Luke 18:38

Having been brought up a Jew, he was not ignorant that of the seed of David should God be born according to the flesh, and therefore he addresses Him as God, saying, Have mercy upon me. Would that those might imitate him who divide Christ into two. For he speaks of Christ as God, yet calls Him Son of David. But they marvel at the justice of his confession, and some even wished to prevent him from confessing his faith. But by checks of this kind his ardour was not damped. For faith is able to resist all, and to triumph over all. It is a good thing to lay aside shame in behalf of divine worship. For if for money's sake some are bold, is it not fitting when the soul is at stake, to put on a righteous boldness? As it follows, But he cried out the more, Son of David, & c.

(Hom. de caeco et Zacchaeo) There was a great multitude gathered round Christ, and the blind man indeed knew Him not, but felt a drawing towards Him, and grasped with his heart what his sight embraced not. As it follows, And when he heard the multitude passing by, he asked what it was. And those that saw spoke indeed according to their own opinion. And they told him that Jesus of Nazareth passeth by. But the blind man cried out. He is told one thing, he proclaims another; for it follows, And he cried out, saying, Jesus, thou Son of David, have mercy on me. Who taught thee this, O man? Hast thou that art deprived of sight read books? Whence then knowest thou the Light of the world? Verily the Lord giveth sight to the blind. (Ps. 146:8.)

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.