John Chrysostom

Seest thou how each of them that bore witness of His authority is marvelled at? "And the multitudes were astonished at His doctrine, because He taught as one having authority;" and so far from blaming them, He both took them with Him when He came down, and by His words of cleansing to the leper, confirmed their judgment. Again, that leper said, "If thou wilt, thou canst make me clean;" and so far from rebuking, He on the contrary cleansed him by such treatment as He had said. …

Homily on the Gospel of Matthew 26 ↗

Augustine of Hippo

This man was from the Gentiles: for he was a centurion. The Jewish nation already had a soldier of the Roman empire. There he performed the duties of a soldier as far as a centurion could do; both under authority and having authority; obedient as a subordinate, ruling over subordinates. …

Sermon 62.2 ↗

Jerome

But when Jesus heard this, he marveled and said to those who followed him, 'Truly, I tell you, with no one in Israel have I found such faith. I tell you, many will come from east and west and recline at table with Abraham, Isaac, and Jacob in the kingdom of heaven, while the sons of the kingdom will be thrown into the outer darkness. In that place there will be weeping and gnashing of teeth.' Amen I say to you, I have not found such great faith in Israel. …

Commentary on Matthew ↗

Thomas Aquinas

When Jesus heard him, he marveled... Here he touches on Christ's kindness. But how can he say, he marveled? For marveling finds no place in God, because it arises from ignorance of a cause, which cannot occur in God. But it is also due to apprehending the greatness of an effect and takes place through imagining and phantasizing some great effect. In this sense it can take place even in Christ; hence he marveled, i.e., regarded something as great, and expressed it to the crowd following. …

Commentary on Matthew ↗