Acts 2:23

Then, having fallen upon the mention of that their sacrilegious outrage, observe how he endeavors to quit them of the crime: "Him," he says, "being by the determinate counsel and foreknowledge of God delivered up": adding however, "ye have taken, and by wicked hands have crucified and slain": for though it was predetermined, still they were murderers. "By the determinate counsel and foreknowledge of God:" all but using the same words as Joseph did; just as he said to his brethren; "Be not angry one with another by the way: God sent me hither." It is God's doing. "What of us, then?" (it might be said,) "it was even well done on our part." That they may not say this, therefore it is that he adds, "By wicked hands ye have crucified and slain." Here then he hints at Judas; while at the same time he shows them that it was not from any strength of theirs, and would not have been, if He had not Himself permitted it: it was God that delivered Him up. He has transferred the evil entire upon the head of Judas, now already parted from them; for he it was that delivered Him over to them by the kiss. Or, "By wicked hands," refers to the soldiers: for neither is it simply, "Ye have slain," but, By wicked men ye have done this.

Thereupon in saying, "By the determinate counsel and foreknowledge of God," he shows that it was not because they had the power to do it, and that there was a wisdom and a Divine arrangement in the event, seeing it was from God. He rapidly passes over the unpleasant part.

Also, permitting himself to suffer in accordance with the law of flesh born from the womb of a mother, he himself preferred to die in order that the world might not lose life. But that which was born of a child-bearing virgin, that died. Innocent, he was hung from a tree, and the burden of the tree [of Adam] was removed. Thus the wound of the unrighteous [Adam] became the medicine of God.

Since they advanced in their daring by means of the cross, he also attempts to free them by saying, "and foreknowledge of God," at once showing that his suffering was voluntary and that he ministered to the predestined, but even while clearing them he does not entirely abandon the charge against them.

For he urges, saying, "you delivered him up and denied him by the hands of lawless men;" for it is through the hands of the lawless, namely Judas and the soldiers. For if indeed those who wandered were wicked, certainly those who killed were also so. And when he had therefore gradually rebuked them, taking up thereafter greater boldness he rebukes them more plainly, saying:

By the definite plan and foreknowledge of God, this man was handed over to you, and with the help of wicked men, you put him to death by nailing him to the cross. The Greek has one more word which pertains significantly to the cause: "Foreknowledge of God handing him over." For he was handed over by the governor into their power with the condition that they could choose either him or the robber; and they, having received this option, granted life to the robber and, by their own shouts and prayers, put Jesus to death through the hands of the soldiers.

Jesus of Nazareth, a man approved by God, and so on until you afflicted and killed Him. Like a learned teacher, he first admonishes the unbelievers, whom he pities, to give advice of salvation later when pierced by just fear. And because he speaks to those who know the law, he shows that Christ Himself is the One promised by the prophets. However, he does not first call Him the Son of God by his own authority, but a man approved, a just man, a man resurrected from the dead, not in the common resurrection along with the others, which is delayed until the end of the world, but celebrated on the third day, so that the assertion of a singular glorious resurrection might bear the testimony of eternal divinity. Since the bodies of others are proven to have undergone corruption after death, this one, of whom it is said: You will not let Your Holy One see corruption (Psalm XV), is shown to be free from human frailty, and proven to have surpassed the merits of human condition, and therefore more deserving to be ascribed to God than to humans. You will learn from the story of Cornelius the centurion and in the sermon given by the Apostle Paul in Athens what kind of introduction the apostles use in their preaching to the Gentiles.

Then, having attacked their lawlessness, he tries to relieve them of responsibility for it and says: "by the determined counsel," showing by this that they did not do what they dared by their own power, but because He Himself consented to it and because it was determined from above.
Furthermore, lest it should seem that they were innocent — since although this was determined, yet they were the murderers — lest it should seem so, he adds: "by the hands of lawless men," that is, either through the traitor Judas, or through the soldiers who crucified Christ. Although it is known that those who nailed Him to the cross committed lawlessness, nevertheless Peter first speaks of this unclearly, so as not to drive them to despair.