First Reading — Acts 2:1-11
Tertullian
On 2:1
The first infusion of the Holy Spirit into the congregated disciples took place at "the third hour." Peter, on the day on which he experienced the vision of Universal Community, (exhibited) in that small vessel, had ascended into the more lofty parts of the house, for prayer's sake "at the sixth hour.
On 2:1
Further: since in the self-same commentary of Luke the third hour is demonstrated as an hour of prayer, about which hour it was that they who had received the initiatory gift of the Holy Spirit were held for drunkards; and the sixth, at which Peter went up on the roof; and the ninth, at which they entered the temple: why should we not understand that, with absolutely perfect indifference, we must pray always, and everywhere, and at every time; yet still that these three hours, as being more marked in things human-(hours) which divide the day, which distinguish businesses, which re-echo in the public ear-have likewise ever been of special solemnity in divine prayers? A persuasion which is sanctioned also by the corroborative fact of Daniel praying thrice in the day; of course, through exception of certain stated hours, no other, moreover, than the more marked and subsequently apostolic (hours)-the third, the sixth, the ninth.
On 2:9
For upon whom else have the universal nations believed, but upon the Christ who is already come? For whom have the nations believed,-Parthians, Medes, Elamites, and they who inhabit Mesopotamia, Armenia, Phrygia, Cappadocia, and they who dwell in Pontus, and Asia, and Pamphylia, tarriers in Egypt, and inhabiters of the region of Africa which is beyond Cyrene, Romans and sojourners, yes, and in Jerusalem Jews, and all other nations; as, for instance, by this time, the varied races of the Gµtulians, and manifold confines of the Moors, all the limits of the Spains, and the diverse nations of the Gauls, and the haunts of the Britons-inaccessible to the Romans, but subjugated to Christ, and of the Sarmatians, and Dacians, and Germans, and Scythians, and of many remote nations, and of provinces and islands many, to us unknown, and which we can scarce enumerate? In all which places the name of the Christ who is already come reigns, as of Him before whom the gates of all cities have been opened, and to whom none are closed, before whom iron bars have been crumbled, and brazen gates opened.
Responsorial Psalm — Psalm 104:1, 24, 29-30, 31, 34
Clement of Rome
On 103:4
This is the way, dear friends, in which we found out salvation, namely Jesus Christ, the high priest of our offerings, the guardian and helper of our weakness. Through him let us look steadily into the heights of heaven; through him we see as in a mirror his faultless and transcendent face; through him the eyes of our hearts have been opened; through him our foolish and darkened mind springs up into the light; through him the Master has willed that we should taste immortal knowledge, for "he, being the radiance of his majesty, is as much superior to angels as the name he has inherited is more excellent." For so it is written: "He makes his angels winds and his ministers flames of fire." But of his Son the Master spoke thus: "You are my Son; today I have begotten you. Ask of me, and I will give you the Gentiles for your inheritance and the ends of the earth for your possession." And again he says to him, "Sit at my right hand, until I make your enemies a footstool for your feet." Who, then, are these enemies? Those who are wicked and resist his will.
Second Reading — 1 Corinthians 12:3b-7, 12-13
Clement of Rome
On 12:12
The great cannot subsist without the small, nor the small without the great. There is a kind of mixture in all things, and thence arises mutual advantage. Let us take our body for an example. The head is nothing without the feet, and the feet are nothing without the head; yea, the very smallest members of our body are necessary and useful to the whole body. But all work harmoniously together, and are under one common rule for the preservation of the whole body.
Gospel — John 20:19-23
John Chrysostom
On 20:19
(Hom. lxxxvi) The disciples, when they heard what Mary told them, were obliged either to disbelieve, or, if they believed, to grieve that He did not count them worthy to have the sight of Him. He did not let them however pass a whole day in such reflections, but in the midst of their longing trembling desires to see Him, presented Himself to them: Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews.
On 20:19
(Hom. lxxxvi) It is wonderful that they did not think him a phantom. But Mary had provided against this, by the faith she had wrought in them. And He Himself too shewed Himself so openly, and strengthened their wavering minds by His voice: And saith unto them, Peace he unto you, i. e. Be not disturbed. Wherein too He reminds them of what He had said before His crucifixion; My peace I give to you; (c. 14:27; 16:33) and again, In Me ye shall have peace.
On 20:19
(Hom. lxxxvi) All these things brought them to a most confident faith. As they were in endless war with the Jews, He says again, Then said Jesus unto them again, Peace be unto you.
On 20:20
(Hom. lxxxvi) And what He had promised before the crucifixion, I shall see you again, and your heart shall rejoice, is now fulfilled: Then were the disciples glad when they saw the Lord.
On 20:21
(Hom. lxxxvi. 3) At the same time He shews the efficacy of the cross, by which He undoes all evil things, and gives all good things; which is peace. To the women above there was announced joy; for that sex was in sorrow, and had received the curse, In sorrow shalt thou bring forth. (Gen. 3:16) All hindrances then being removed, and every thing made straight, (πατωρθωται.) he adds, As My Father hath sent Me, even so send I you.
On 20:22
(Hom. lxxxvi. 2) Having then given them confidence by His own miracles, and appealing to Him who sent Him, He uses a prayer to the Father, but of His own authority gives them power: And when He had said thus, He breathed on them, and saith unto them, Receive ye the Holy Ghost.
On 20:23
(Hom. lxxxvi) Some say that by breathing He did not give them the Spirit, but made them meet to receive the Spirit. For if Daniel’s senses were so overpowered by the sight of the Angel, how would they have been overwhelmed in receiving that unutterable gift, if He had not first prepared them for it! It would not be wrong however to say that they received then the gift of a certain spiritual power, not to raise the dead and do miracles, but to remit sins: Whosesoever sins ye remit, they are remitted unto them, and whosesoever sins ye retain, they are retained.