11 Which also said, Ye men of Galilee, why stand ye gazing up into heaven? this same Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.
[AD 220] Tertullian on Acts 1:3-11
The Passover affords a more than usually solemn day for baptism; when, withal, the Lord's passion, in which we are baptized, was completed. Nor will it be incongruous to interpret figuratively the fact that, when the Lord was about to celebrate the last Passover, He said to the disciples who were sent to make preparation, "You will meet a man bearing water." He points out the place for celebrating the Passover by the sign of water. After that, Pentecost is a most joyous space for conferring baptisms; wherein, too, the resurrection of the Lord was repeatedly proved among the disciples [Acts 1:3], and the hope of the advent of the Lord indirectly pointed to, in that, at that time, when He had been received back into the heavens [Acts 1:9], the angels told the apostles that "He would so come, as He had withal ascended into the heavens;" [Acts 1:11] at Pentecost, of course. But, moreover, when Jeremiah says, "And I will gather them together from the extremities of the land in the feast-day," he signifies the day of the Passover and of Pentecost, which is properly a "feast-day." However, every day is the Lord's; every hour, every time, is apt for baptism: if there is a difference in the solemnity, distinction there is none in the grace.

[AD 220] Tertullian on Acts 1:11
He is seen by Stephen, at his martyrdom by stoning, still sitting at the right hand of God [Acts 7:55] where He will continue to sit, until the Father shall make His enemies His footstool. [Hebrews 10:12-13] He will come again on the clouds of heaven, just as He appeared when He ascended into heaven. [Acts 1:11]

[AD 220] Tertullian on Acts 1:11
When [Scripture] defines the very Christ to be but one, it shakes the fancies of those who exhibit a multiform Christ, who make Christ to be one being and Jesus another — representing one as escaping out of the midst of the crowds, and the other as detained by them; one as appearing on a solitary mountain to three companions, clothed with glory in a cloud, the other as an ordinary man holding intercourse with all, one as magnanimous, but the other as timid; lastly, one as suffering death, the other as risen again, by means of which event they maintain a resurrection of their own also, only in another flesh. Happily, however, He who suffered "will come again from heaven," [Acts 1:11] and by all shall He be seen, who rose again from the dead. They too who crucified Him shall see and acknowledge Him; that is to say, His very flesh, against which they spent their fury, and without which it would be impossible for Himself either to exist or to be seen; so that they must blush with shame who affirm that His flesh sits in heaven void of sensation, like a sheath only, Christ being withdrawn from it; as well as those who (maintain) that His flesh and soul are just the same thing, or else that His soul is all that exists, but that His flesh no longer lives.

[AD 220] Tertullian on Acts 1:11
We must after all this turn our attention to those scriptures also which forbid our belief in such a resurrection as is held by your Animalists (for I will not call them Spiritualists), that it is either to be assumed as taking place now, as soon as men come to the knowledge of the truth, or else that it is accomplished immediately after their departure from this life... Who has yet beheld Jesus descending from heaven in like manner as the apostles saw Him ascend, according to the appointment of the two angels? [Acts 1:11] Up to the present moment they have not, tribe by tribe, smitten their breasts, looking on Him whom they pierced. [John 19:37; Zechariah 12:10] No one has as yet fallen in with Elias; [Malachi 4:5] no one has as yet escaped from Antichrist; [1 John 4:3] no one has as yet had to bewail the downfall of Babylon. [Revelation 18:2] And is there now anybody who has risen again, except the heretic? He, of course, has already quitted the grave of his own corpse — although he is even now liable to fevers and ulcers; he, too, has already trodden down his enemies — although he has even now to struggle with the powers of the world. And as a matter of course, he is already a king — although he even now owes to Cæsar the things which are Cæsar's. [Matthew 22:21]

[AD 220] Tertullian on Acts 1:11
In the same way, also, when it defines the very Christ to be but one, it shakes the fancies of those who exhibit a multiform Christ, who make Christ to be one being and Jesus another,-representing one as escaping out of the midst of the crowds, and the other as detained by them; one as appearing on a solitary mountain to three companions, clothed with glory in a cloud, the other as an ordinary man holding intercourse with all, one as magnanimous, but the other as timid; lastly, one as suffering death, the other as risen again, by means of which event they maintain a resurrection of their own also, only in another flesh. Happily, however, He who suffered "will come again from heaven," and by all shall He be seen, who rose again from the dead.

[AD 220] Tertullian on Acts 1:11
Who is it then, that has aroused the Lord, now at God's right hand so unseasonably and with such severity "shake terribly" (as Isaiah expresses it ("that earth," which, I suppose, is as yet unshattered? Who has thus early put "Christ's enemies beneath His feet" (to use the language of David ), making Him more hurried than the Father, whilst every crowd in our popular assemblies is still with shouts consigning "the Christians to the lions? " Who has yet beheld Jesus descending from heaven in like manner as the apostles saw Him ascend, according to the appointment of the two angels? Up to the present moment they have not, tribe by tribe, smitten their breasts, looking on Him whom they pierced.

[AD 220] Tertullian on Acts 1:11
He will come again on the clouds of heaven, just as He appeared when He ascended into heaven. Meanwhile He has received from the Father the promised gift, and has shed it forth, even the Holy Spirit-the Third Name in the Godhead, and the Third Degree of the Divine Majesty; the Declarer of the One Monarchy of God, but at the same time the Interpreter of the Economy, to every one who hears and receives the words of the new prophecy; and "the Leader into all truth," such as is in the Father, and the Son, and the Holy Ghost, according to the mystery of the doctrine of Christ.

[AD 407] John Chrysostom on Acts 1:11
Now, as they watched, their conceptions were elevated. He gave them not merely a subtle hint of the nature of his second coming. For this phrase—“thus he will come”—means with the body. This is what they desired to hear. And concerning the judgment he said again that he will come in this same way upon a cloud.

[AD 407] John Chrysostom on Acts 1:11
In us “after the flesh” implies our being in sins; “not after the flesh” implies not being in sins. In Christ, however, “after the flesh” implies his being subject to the affections of nature, such as thirst, hunger, weariness, sleep. (For “he committed no sin, and no deceit was found in his mouth.” Therefore he also said, “Which of you convicts me of sin?” and again, “The ruler of this world is coming, and he has no power over me.”) For him the phrase “not after the flesh,” then, means being freed from even these things, not being without flesh. For indeed with the flesh he comes to judge the world, with a flesh that is impassible and unmixed. We too will advance toward this, when our body conforms “to the body of his glory.”

[AD 420] Jerome on Acts 1:11
[Daniel 7:13-14] "And behold, there came One with the clouds of heaven like unto the Son of man." He who was described in the dream of Nebuchadnezzar as a rock cut without hands, which also grew to be a large mountain, and which smashed the earthenware, the iron, the bronze, the silver, and the gold is now introduced as the very person of the Son of man, so as to indicate in the case of the Son of God how He took upon Himself human flesh; according to the statement which we read in the Acts of the Apostles: "Ye men of Galilee, why stand ye gazing up towards heaven? This Jesus who has been taken up from you into heaven, shall so come in like manner as ye have seen Him going into heaven" (Acts 1:11).

"...And He arrived unto the Ancient of days, and they brought Him before His presence, and He gave unto Him authority and honor and royal power." All that is said here concerning His being brought before Almighty God and receiving authority and honor and royal power is to be understood in the light of the Apostle's statement: "Who, although He was in the form of God, thought it not robbery to be equal with God; but emptied Himself, taking the form of a servant, being made in the likeness of men, and was found in His condition to be as a man: He humbled Himself, becoming obedient unto death, even to the death of the cross" (Philippians 2:6-8). And if the sect of the Arians were willing to give heed to all this Scripture with a reverent mind, they would never direct against the Son of God the calumny that He is not on an equality with God.

"...And He is the one whom all the peoples, tribes, and language-groups shall serve. His authority is an eternal authority which shall not be removed, and His kingdom shall be one that shall never be destroyed..." Let Porphyry answer the query of whom out of all mankind this language might apply to, or who this person might be who was so powerful as to break and smash to pieces the little horn, whom he interprets to be Antiochus? If he replies that the princes of Antiochus were defeated by Judas Maccabaeus, then he must explain how Judas could be said to come with the clouds of heaven like unto the Son of man, and to be brought unto the Ancient of days, and how it could be said that authority and royal power was bestowed upon him, and that all peoples and tribes and language-groups served him, and that his power is eternal and not terminated by any conclusion.

[AD 430] Augustine of Hippo on Acts 1:11
How did they see him go? In the flesh which they touched, which they felt, the scars of which they even probed by touching; in that body in which he went in and out with them for forty days, manifesting himself to them in truth, not in any falsity; not as an apparition, not as a shadow, not as a spirit, but as he himself said, not deceiving, “Handle and see, for a spirit does not have flesh and bones, as you see me to have.” Now, indeed, that body is worthy of a heavenly dwelling place, not subject to death, not changeable through ages. For as he had grown to that age from infancy, so he does not decline to old age from the age which was young adulthood. He remains as he ascended. He is going to come to those to whom, before he comes, he wanted his word to be preached. So, therefore, he will come in a human form. The ungodly, too, will see this. Those placed to the right will see it too; those separated to the left will see it too, as it was written, “They shall see him whom they have pierced.” If they will see him whom they have pierced, they will see the same body which they thrust through with a spear; [for] the Word is not struck by a spear. Therefore, the ungodly will be able to see this very one whom they were also able to wound. They will not see the God lying hidden in the body; after the judgment he will be seen by those who will be on the right. This, therefore, is why he said, “The Father judges no one but has given all judgment to the Son,” because the Son will come, clearly visible, to the judgment, appearing in human body to human beings, saying to those on the right, “Come, blessed of my Father, receive the kingdom”; saying to those on the left, “Go into everlasting fire which was prepared for the devil and his angels.”

[AD 458] Theodoret of Cyrus on Acts 1:11
Now they saw his nature as limited. For I have heard the words of the Lord, “You shall see the Son of man coming in the clouds of heaven,” and I acknowledge that what is seen by human eyes is limited, for the unlimited nature is invisible. Furthermore to sit upon a throne of glory and to set the lambs upon the right and the kids upon the left indicates limitation.

[AD 735] Bede on Acts 1:11
This Jesus, who was taken up from you into heaven. For two reasons the angels are seen: that they might console them in their sorrow of the ascension with the remembrance of his return, and to show that he truly ascends into heaven, and not as it were into heaven like Elijah.

[AD 735] Bede on Acts 1:11
He will come in the same way as you saw him go into heaven. That is, he will come to judge in the same form and substance of the flesh in which he came to be judged. To whom certainly immortality was given, but nature was not taken away. Whose divine glory, which once appeared on the mountain to the three disciples, will be seen by all the saints when the judgment is complete, when the impious will be taken away so that they do not see the glory of God.

[AD 1274] Thomas Aquinas on Acts 1:11
Now He ascended into heaven from Mount Olivet which overlooks the valley of Josaphat. Therefore He will come to judge in the neighborhood of that place.