First Reading — Acts 1:12-14
Cyprian
On 1:14
"Blessed," says He, "are the peacemakers; for they shall be called the sons of God." [Matthew 5:9] It behooves the sons of God to be peacemakers, gentle in heart, simple in speech, agreeing in affection, faithfully linked to one another in the bonds of unanimity.
This unanimity formerly prevailed among the apostles; and thus the new assembly of believers, keeping the Lord's commandments, maintained its charity. Divine Scripture proves this, when it says, "But the multitude of them which believed were of one heart and of one soul." [Acts 4:32] And again: "These all continued with one mind in prayer with the women, and Mary the mother of Jesus, and with His brethren." [Acts 1:14] And thus they prayed with effectual prayers; thus they were able with confidence to obtain whatever they asked from the Lord's mercy.
On 1:14
Before all things, the Teacher of peace and the Master of unity would not have prayer to be made singly and individually, as for one who prays to pray for himself alone. For we say not "My Father, which art in heaven," nor "Give me this day my daily bread; "nor does each one ask that only his own debt should be forgiven him; nor does he request for himself alone that he may not be led into temptation, and delivered from evil. Our prayer is public and common; and when we pray, we pray not for one, but for the whole people, because we the whole people are one. The God of peace and the Teacher of concord, who taught unity, willed that one should thus pray for all, even as He Himself bore us all in one... Thus also we find that the apostles, with the disciples, prayed after the Lord's ascension: "They all," says the Scripture, "continued with one accord in prayer, with the women, and Mary who was the mother of Jesus, and with His brethren." [Acts 1:14] They continued with one accord in prayer, declaring both by the urgency and by the agreement of their praying, that God, "who makes men to dwell of one mind in a house," only admits into the divine and eternal home those among whom prayer is unanimous.
Responsorial Psalm — Psalm 27:1, 4, 7-8
Gregory of Nyssa
On 26:1
He is called a light by David, and from there the light of knowledge shines in people who are enlightened.
Second Reading — 1 Peter 4:13-16
Polycarp of Smyrna
On 4:16
Let us then continually persevere in our hope, and the earnest of our righteousness, which is Jesus Christ, "who bore our sins in His own body on the tree," "who did no sin, neither was guile found in His mouth," but endured all things for us, that we might live in Him. Let us then be imitators of His patience; and if we suffer for His name's sake, let us glorify Him. For He has set us this example in Himself, and we have believed that such is the case.
Gospel — John 17:1-11a
Hilary of Poitiers
On 17:1
(iii. Tr. c. 10) He doth not say that the day, or the time, but that the hour is come. An hour contains a portion of a day. What was this hour? He was now to be spit upon, scourged, crucified. But the Father glorifies the Son. The sun failed in his course, and with him all the other elements felt that death. The earth trembled under the weight of our Lord hanging on the Cross, and testified that it had not power to hold within it Him who was dying. The Centurion proclaimed, Truly this was the Son of God. (Matt. 27:54) The event answered the prediction. Our Lord had said, Glorify Thy Son, testifying that He was not the Son in name only, but properly the Son. Thy Son, He saith. Many of us are sons of God; but not such is the Son. For He is the proper, true Son by nature, not by adoption, in truth, not in name, by birth, not by creation. Therefore after His glorifying, to the manifestation of the truth there succeeded confession. The Centurion confesses Him to be the true Son of God, that so none of His believers might doubt what one of His persecutors could not deny.
On 17:1
(iii. de. Trin) But perhaps this proves weakness in the Son; His waiting to be glorified by one superior to Himself. And who does not confess that the Father is superior, seeing that He Himself saith, The Father is greater than I? But beware lest the honour of the Father impair the glory of the Son. It follows: That Thy Son also may glorify Thee. So then the Son is not weak, inasmuch as He gives back in His turn glory for the glory which He receives. This petition for glory to be given and repaid, shews the same divinity to be in both.
On 17:1
(v. de Tr. 3) But it must be clear to every one that the reality of any thing is evidenced by its power. For that is true wheat, which when rising with grain and fenced with ears, and shaken out by the winnowing machine, and ground into corn, and baked into bread, and taken for food, fulfils the nature and function of bread. I ask then wherein the truth of Divinity is wanting to the Son, Who hath the nature and virtue of Divinity. For He so made use of the virtue of His nature, as to cause to be things which were not, and to do every thing which seemed good to Him.
On 17:1
(iii. de Trin) This new glory with which our Lord had glorified the Father, does not imply any advancement2 in Godhead, but refers to the honour received from those who are converted from ignorance to knowledge.
On 17:1
(iii. de Trin) Or He prayed that that which was mortal, might receive the glory immortal, that the corruption of the flesh might be transformed and absorbed into the incorruption of the Spirit.
On 17:2
(iii. de Trin) For being made flesh Himself, He was about to restore eternal life to frail, corporeal, and mortal man.
On 17:2
(ix. de Trin. 31) If Christ be God, not begotten, but unbegotten, then let this receiving be thought weakness. But not if His receiving of power signifies His begetting, in which He received what He is. This gift cannot be counted for weakness. For the Father is such in that He gives; the Son remains God in that He hath received the power of giving eternal life.
On 17:3
(iii. de Tr. c. 14) And in what eternal life is, He then shews: And this is life eternal, that they might know Thee, the only true God. To know the only true God is life, but this alone does not constitute life. What else then is added? And Jesus Christ whom Thou hast sent.
On 17:3
(iv. de Tr. c. 9) The Arians hold, that as the Father is the only true, only just, only wise God, the Son hath no communion of these attributes; for that which is proper to one, cannot be partaken of by another. And as these are as they think in the Father alone, and not in the Son, they necessarily consider the Son a false and vain God.
On 17:3
(ix. de Trin) Because He says, Thee the only, does He separate Himself from communion and unity with God? He doth separate Himself, but that He adds immediately, And Jesus Christ Whom Thou hast sent. For the Catholic faith confesses Christ to be true God, in that it confesses the Father to be the only true God; for natural birth did not introduce any change of nature into the Only-Begotten God.
On 17:5
(ix. de Trin) After which, that we may understand the reward of His obedience, and the mystery of the whole dispensation, He adds, And now glorify Me with the glory with Thine own Self, with the glory which I had with Thee before the world was.