George Haydock's Catholic Commentary
Psalms 23:8
Who. This is the question of the Levites, when the ark approached, or of the angels in heaven, who hold a dialogue with the attendants of Christ. These return a satisfactory answer only at the second demand, having first given four titles to their great king. (Berthier) --- Some of the Fathers suppose that the angels in heaven were not acquainted with the incarnation. (St. Justin Martyr, dial.; Theodoret; St. Jerome in Isaias lxiii.) But the latter here asserts that the good and bad angels hold a dialogue, or that the former address the spirits in limbo, announcing to them their speedy deliverance in consequence of Christ's victory over the devil. The dialogue is rather (Calmet) between the angels in heaven, and the spirits of the just, (St. Athanasius) or other angels, who accompanied Christ in his ascension. (Calmet) --- The angels express their admiration of the glory with which Christ, (Worthington) in our human nature, (Haydock) was environed; and the prophet replies, that he had overcome all his opponents, and again orders the gates to open. (Worthington) --- The angels were not ignorant, but gave occasion to a further display of the conqueror's dignity, and expressed their surprise that men should enter heaven. (Menochius)