First Reading — Daniel 12:1-3
Irenaeus
On 12:3
For every prophecy, before its fulfilment, is to men [full of] enigmas and ambiguities. But when the time has arrived, and the prediction has come to pass, then the prophecies have a clear and certain exposition. And for this reason, indeed, when at this present time the law is read to the Jews, it is like a fable; for they do not possess the explanation of all things pertaining to the advent of the Son of God, which took place in human nature; but when it is read by the Christians, it is a treasure, hid indeed in a field, but brought to light by the cross of Christ, and explained, both enriching the understanding of men, and showing forth the wisdom of God and declaring His dispensations with regard to man, and forming the kingdom of Christ beforehand, and preaching by anticipation the inheritance of the holy Jerusalem, and proclaiming beforehand that the man who loves God shall arrive at such excellency as even to see God, and hear His word, and from the hearing of His discourse be glorified to such an extent, that others cannot behold the glory of his countenance, as was said by Daniel: "Those who do understand, shall shine as the brightness of the firmament, and many of the righteous as the stars for ever and ever."
Responsorial Psalm — Psalm 16:5, 8, 9-10, 11
Athanasius of Alexandria
On 15:9
We die not by our own choice but by necessity of nature and against our will. However, the Lord, being himself immortal yet having mortal flesh, had power, as God, to separate from his body and to take it back again, when he would.… For it was fitting that the flesh, corruptible as it was, should no longer after its own nature remain mortal, but because of the Word who had put it on, should abide incorruptible. For as he, having come in our body, was conformed to our condition, so we, receiving him, partake of the immortality that is from him.
Second Reading — Hebrews 10:11-14, 18
Ignatius of Antioch
On 10:12
Stop your ears, therefore, when any one speaks to you at variance with Jesus Christ, the Son of God, who was descended from David, and was also of Mary; who was truly begotten of God and of the Virgin, but not after the same manner. For indeed God and man are not the same. He truly assumed a body; for "the Word was made flesh," and lived upon earth without sin. For says He, "Which of you convicteth me of sin? " He did in reality both eat and drink. He was crucified and died under Pontius Pilate. He really, and not merely in appearance, was crucified, and died, in the sight of beings in heaven, and on earth, and under the earth. By those in heaven I mean such as are possessed of incorporeal natures; by those on earth, the Jews and Romans, and such persons as were present at that time when the Lord was crucified; and by those under the earth, the multitude that arose along with the Lord. For says the Scripture, "Many bodies of the saints that slept arose," their graves being opened. He descended, indeed, into Hades alone, but He arose accompanied by a multitude; and rent asunder that means of separation which had existed from the beginning of the world, and cast down its partition-wall. He also rose again in three days, the Father raising Him up; and after spending forty days with the apostles, He was received up to the Father, and "sat down at His right hand, expecting till His enemies are placed under His feet." On the day of the preparation, then, at the third hour, He received the sentence from Pilate, the Father permitting that to happen; at the sixth hour He was crucified; at the ninth hour He gave up the ghost; and before sunset He was buried. During the Sabbath He continued under the earth in the tomb in which Joseph of Arimathaea had laid Him. At the dawning of the Lord's day He arose from the dead, according to what was spoken by Himself, "As Jonah was three days and three nights in the whale's belly, so shall the Son of man also be three days and three nights in the heart of the earth." The day of the preparation, then, comprises the passion; the Sabbath embraces the burial; the Lord's Day contains the resurrection.
Gospel — Mark 13:24-32
Augustine of Hippo
On 13:26
(de Trin. i. 13) For the vision of the Son of Man is shewn even to the bad, but the vision of the form of God to the pure in heart alone, for they shall see God. (Matt. 5:8) And because the wicked cannot see the Son of God, as He is in the form of God, equal to the Father, and at the same time both just and wicked are to see Him as Judge of the quick and dead, before Whom they shall be judged, it was necessary that the Son of Man should receive power to judge. Concerning the execution of which power, there is immediately added, And then shall he send his angels.
On 13:29
(Epist. 119, 11) All that is said by the three Evangelists concerning the Advent of our Lord, if diligently compared together and examined, will perchance be found to belong to His daily coming in His body, that is, the Church, except those places where that last coming is so promised, as if it were approaching; for instance in the last part of the discourse according to Matthew, the coming itself is clearly expressed, where it is said, When the Son of Man shall come in his glory. (Matt. 25:31) For what does he refer to in the words, when ye shall see these things come to pass, but those things which He has mentioned above, amongst which it is said, And then ye shall see the Son of Man coming in the clouds. The end therefore shall not be then, but then it shall be near at hand. Or are we to say, that not all those things which are mentioned above are to be taken in, but only some of them, that is, leaving out these words, Then shall ye see the Son of man coming; for that shall be the end itself, and not its approach only. But Matthew has declared that it is to be received without exception, saying, When ye shall see all these things, know that it is near, even at the doors. That which is said above must therefore be taken thus; And he shall send his angels, and gather together the elect from the four winds; that is, He shall collect His elect from the four winds of heaven, which He does in the whole of the last hour, coming in His members as in clouds.