John 9:38

(Hom. lix. 1) He adds the deed to the word, as a clear acknowledgment of His divine power. The Lord replies in a way to confirm His faith, and at the same time stirs up the minds of His followers: And Jesus said, For judgment have I come into this world.

"He saith, Lord, I believe; and he worshiped Him." He said not, "I am He that healed thee, that bade thee, Go, wash in Siloam"; but keeping silence on all these points, He saith, "Dost thou believe on the Son of God?" and then the man, showing his great earnestness, straightway worshiped; which few of those who were healed had done; as, for instance, the lepers, and some others; by this act declaring His divine power. For that no one might think that what had been said by him was a mere expression, he added also the deed.

(Tr. xliv. 15) First, He washes the face of his heart. Then, his heart's face being washed, and his conscience cleansed, he acknowledges Him as not only the Son of man, which he believed before, but as the Son of God, Who had taken flesh upon Him: And he said, Lord, I believe. I believe, is a small thing. Wouldest thou see what he believes of Him? And falling down, he worshipped Him. (Vulgate)

An example to us, not to pray to God with uplifted neck, but prostrate upon earth, suppliantly to implore His mercy.