John Chrysostom

Since then they were not worthy, go ye, saith He, into the highways, and as many as ye shall find, bid; both the common sort, and the outcasts. For because He had said in every way, "The harlots and publicans shall inherit heaven;" and, "The first shall be last, and the last first;" He shows that justly do these things come to pass; which more than anything stung the Jews, and goaded them far more grievously than their overthrow, to see those from the Gentiles brought into their privileges, and into far greater than theirs. …

Homily on the Gospel of Matthew 69 ↗

Jerome

For there is an infinite difference among the Gentiles themselves; some are more prone to vice, others are endowed with more incorrupt and virtuous manners.

Catena Aurea by Aquinas ↗

Gregory the Dialogist

It follows: "And his servants went out into the roads and gathered all whom they found, both bad and good, and the wedding was filled with guests." Behold, now by the very quality of those dining together it is openly shown that through these royal nuptials the present Church is designated, in which both good and evil come together. For it is mixed with a diversity of children, because although it begets all unto faith, yet it does not lead all through a change of life to the liberty of spiritual grace, their faults preventing it. …

Forty Gospel Homilies, Homily 38 ↗

Thomas Aquinas

There follows the execution: and his servants going forth into the ways, gathered together all; Mark 16:20: but they going forth preached everywhere, the Lord working withal. But what does he mean when he says good and bad? It can be said, those who were first bad, and afterward good. Or it can be said, when he says good and bad, that he speaks comparatively, since among them some are good according to civil virtues. Or good and bad, because after they were gathered together, good and bad are mixed together. …

Commentary on Matthew ↗