ACC ~ Acts 13 v33

THEY RECEIVE THE REALITY BEHIND THE PROMISE. CHRYSOSTOM: But let us look back to what was said. The promise then, he says, was what the fathers received, but you the reality. … And notice how nowhere does he mention their right deeds but only benefits on God’s part: “he chose, he exalted, he bore with them.” These words are not praises of them. “They asked, he gave.” But David he does praise, and him alone, because it is from him that Christ was to come. HOMILIES ON THE ACTS OF THE APOSTLES 29.

YOU ARE MY SON. CYRIL OF ALEXANDRIA: The only one who knows the Father and who is only known by the Father as his Wisdom and Word and as “the Angel of great counsel” according to the prophet, perfectly explains to us the mystery of the incarnation. Since he was Son by nature and by truth and had shone forth from the very essence of God the Father, he was made flesh, that is, man, according to John.He desired to be called the brother of those who are in the world and to be born according to flesh like us. However, he was before time and sat with his parent even though he was made flesh. The Father knew him also as Son and said to him, “You are my Son; today I have begotten you.” Observe the explicit confession, nay rather, the proclamation! Indeed, he said, “you are” in order to point out that he existed before time. Actually, he was never in time but was always the same, to be sure, the Son. And he added, “today I have begotten you,” in order to indicate his final generation according to the flesh that he voluntarily underwent in the womb of the holy Virgin so that he was also called “begotten of God.” CATENA ON THE ACTS OF THE APOSTLES 13.33.

THE SECOND PSALM. BEDE: It should not be supposed that this example of the psalm pertains to Christ’s resurrection, even though he [Paul] mentions it next to [his reference to] that event. Instead, it pertains to his incarnation, about which he spoke above. Moreover, the following verse very clearly bears witness to the resurrection. Since in the preceding verses he [Paul] concerned himself with his [Christ’s] incarnation, passion and resurrection, he wished to provide each [of these events] equally with testimonies furnished by a psalm. You then, he says, are eternal, Son before the ages. Now will you appear, born in time. Some manuscripts have, “just as is written in the first psalm.” This is explained as follows, “Among the Hebrews the first and second psalms” are conflated “in one psalm, which begins with blessedness and comes to a close in blessedness.”COMMENTARY ON THE ACTS OF THE APOSTLES 13.33.