2:1 - Now we plead to you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him,

Tertullian On the Resurrection of the Flesh
For the mystery of iniquity doth already work; only he who now hinders must hinder, until he be taken out of the way."[170]
Origen Against Celsus Book VI
And for this cause God shall send them strong delusion, that they should believe a lie; that they all might be damned who believed not the truth, but had pleasure in unrighteousness."[236]
Hippolytus Dogmatical and Historical Fragments
And for this cause God shall send them strong delusion, that they should believe a lie: that they all might be damned who believed not the truth, but had pleasure in unrighteousness."[152]

2:2 - That all of you be not soon shaken in mind, or be troubled, neither by spirit, nor by word, nor by letter as from us, as that the day of Christ is at hand.

Origen Against Celsus Book III
and whether it were already past, and the day of the Lord, whether it were nigh at hand[36]

2:3 - Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;

Dialogue of Justin
O unreasoning men! understanding not what has been proved by all these passages, that two advents of Christ have been announced: the one, in which He is set forth as suffering, inglorious, dishonoured, and crucified; but the other, in which He shall come from heaven with glory, when the man of apostasy,[420]
Shepherd of Hermas Vision Second
Happy ye who endure the great tribulation that is coming on, and happy they who shall not deny their own life.[13]
Tertullian Against Marcion Book V
Well, but who is the man of sin, the son of perdition," who must first be revealed before the Lord comes; "who opposeth and exalteth himself above all that is called God, or that is worshipped; who is to sit in the temple of God, and boast himself as being God? "[738]
Origen Against Celsus Book II
Paul, moreover, in the second Epistle to the Thessalonians, shows in what manner there will one day be revealed "the man of sin, the son of perdition, who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he sitteth in the temple of God, showing himself that he is God."[115]
Origen Against Celsus Book VI
nor in the writings of Paul,[231]
Dubious Hippolytus Fragments
But as, in accordance with the train of our discussion, we have been constrained to come to the matter of the days of the dominion of the adversary, it is necessary to state in the first place what concerns his nativity and growth; and then we must turn our discourse, as we have said before, to the expounding of this matter, viz., that in all respects the accuser and son of lawlessness[72]
Victorinus Commentary on the Apocalypse of the Blessed John
Paul the apostle says: "Except there come a falling away first, and the man of sin shall appear, the son of perdition; and the adversary who exalted himself above all which is called God, or which is worshipped."[61]
Didache
and then shall appear the world-deceiver[143]

2:4 - Who opposes and exalts himself above all that is called God, or that is worshipped; so that he as God sits in the temple of God, showing himself that he is God.

Irenaeus Against Heresies Book III
And again, speaking of Antichrist, he says, "who opposeth and exalteth himself above all that is called God, or that is worshipped."[45]
Tertullian A Treatise on the Soul
-much more into a man of light-and that at last he will "show himself to be even God,"[339]
Origen Against Celsus Book VI
What is stated by Paul in the words quoted from him, where he says, "so that he sitteth in the temple of God, showing himself that he is God,"[238]
Origen Commentary on Matthew Book XI
When then in such suffering we have spent three watches of the night-that is, of the darkness which is in the temptations-striving nobly with all our might and watching ourselves so as not to make shipwreck concerning the faith or some one of the virtues,-the first watch against the father of darkness and wickedness, the second watch against his son "who opposeth and exalteth himself against all that is called God or thing that is worshipped,"[53]

2:6 - And now all of you know what withholds that he might be revealed in his time.

First Apology of Justin
And that God the Father of all would bring Christ to heaven after He had raised Him from the dead, and would keep Him there[93]
Origen Against Celsus Book II
For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way: and then shall that Wicked be revealed, whom the Lord will consume with the spirit of His mouth, and shall destroy with the brightness of His coming: even him, whose cunning is after the working of Satan, with all power, and signs, and lying wonders, and with all deceivableness of unrighteousness in them that perish."[116]

2:7 - For the mystery of iniquity does already work: only he who now lets will let, until he be taken out of the way.

Lactantius Divine Institutes Book VII
And-my mind dreads to relate it, but I will relate it, because it is about to happen-the cause of this desolation and confusion will be this; because the Roman name, by which the world is now ruled, will be taken away from the earth, and the government return to Asia; and the East will again bear rule, and the West he reduced to servitude.[115]
Victorinus Commentary on the Apocalypse of the Blessed John
The Apostle Paul also bears witness, for he says to the Thessalonians: "Let him who now restraineth restrain, until he be taken out of the way; and then shall appear that Wicked One, even he whose coining is after the working of Satan, with signs and lying wonders."[52]

2:8 - And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:

Irenaeus Against Heresies Book III
with the presence of his coming; [even him] whose coming is after the working of Satan, with all power, and signs, and lying wonders."[56]
Irenaeus Against Heresies Book V
And therefore God will send them the working of error, that they may believe a lie; that they all may be judged who did not believe the truth, but gave consent to iniquity,"[219]
Tertullian On the Resurrection of the Flesh
whose coming is after the working of Satan, with all power, and signs, and lying wonders, and with all deceivableness of unrighteousness in them that perish."[171]
Victorinus Commentary on the Apocalypse of the Blessed John
And Paul, speaking of Antichrist to the Thessalonians, says: "Whom the Lord Jesus will slay by the breath of His mouth."[13]
Origen Commentary on John Book II
Then the Word, arming Himself against the lie, slays it with the breath of His mouth and brings it to naught by the manifestation of His coming.[18]

2:9 - Even him, whose coming is after the working of Satan with all power and signs and lying wonders,

Tertullian Against Marcion Book V
But whichsoever of the two it is, I want to know why he comes "in all power, and with lying signs and wonders? "[742]
Origen Against Celsus Book VI
For, far surpassing the help which these demons give to jugglers (who deceive men for the basest of purposes), is the aid which the devil himself affords in order to deceive the human race. Paul, indeed, speaks of him who is called Antichrist, describing, though with a certain reserve,[235]
Origen Commentary on Matthew Book XII
But to bring back a soul which had gone out, so that it came out of the grave when already stinking and passing the fourth day,[13]

2:10 - And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.

Irenaeus Against Heresies Book V
And for this reason the apostle says: "Because they received not the love of God, that they might be saved, therefore God shall also send them the operation of error, that they may believe a lie, that they all may be judged who have not believed the truth, but consented to unrighteousness."[242]
Tertullian The Prescription Against Heretics
You must "seek" until you "find," and believe when you have found; nor have you anything further to do but to keep what you have believed provided you believe this besides, that nothing else is to be believed, and therefore nothing else is to be sought, after you have found and believed what has been taught by Him who charges you to seek no other thing than that which He has taught.[116]
Tertullian Against Marcion Book V
(to believe a lie), that they all might be judged who believed not the truth, but had pleasure in unrighteousness."[744]
Origen Against Celsus Book II
And for this cause God shall send them strong delusion, that they should believe a lie; that they all might be damned who believed not the truth, but had pleasure in unrighteousness."[117]
Cyprian Epistle LIV
And for this cause God shall send them strong delusion, that they should believe a lie: that they all might be judged who believed not the truth, but had pleasure in unrighteousness."[47]
Cyprian Treatise III On the Lapsed
And for this cause God shall send them the working of error, that they should believe a lie; that they all might be damned who believed not the truth, but had pleasure in unrighteousness."[72]
Victorinus Commentary on the Apocalypse of the Blessed John
And that they might know that he should come who then was the prince, he added: "He already endeavours after the secret of mischief"[53]

2:11 - And for this cause God shall send them strong delusion, that they should believe a lie:

Irenaeus Against Heresies Book IV
Speaking of antichrist, too, he says clearly in the Second to the Thessalonians: "And for this cause God shall send them the working of error, that they should believe a lie; that they all might be judged who believed not the truth, but consented to iniquity."[415]
Tertullian Against Marcion Book V
and "the sending of the strong delusion,"[750]
Cyprian Epistle LXIII
Nevertheless the profound gloom of the falling darkness has so blinded the hearts of some, that they receive no light from the wholesome precepts, but, once turned away from the direct path of the true way, they are hurried headlong and suddenly by the night and error of their sins.[10]
Victorinus Commentary on the Apocalypse of the Blessed John
-that is, the mischief which he is about to do he strives to do secretly; but he is not raised up by his own power, nor by that of his father, but by command of God, of which thing Paul says in the same passage: "For this cause, because they have not received the love of God, He will send upon them a spirit of error, that they all may be persuaded of a lie, who have not been persuaded of the truth."[54]
Origen Commentary on John Book II
For if that general doctrine of the soul is to be received, namely, that it is not sown at the same time with the body, but is before it, and is then, for various causes, clothed with flesh and blood; then the words "sent from God" will not appear to be applicable to John alone. The most evil of all, the man of sin, the son of perdition, is said by Paul to be sent by God:[96]

2:12 - That they all might be damned who believed not the truth, but had pleasure in unrighteousness.

Origen Commentary on Matthew Book XI
" Now, to this we will say, that as many as on account of their perverse interpretation of the things in the law were not a plant of His Father in heaven, were blinded in their minds, as not believing the truth, but taking pleasure in unrighteousness,[121]

2:13 - But we are bound to give thanks always to God for you, brethren beloved of the Lord, because God has from the beginning chosen you to salvation through sanctification of the Spirit and belief of the truth:

The First Epistle of Clement Concerning Virginity
of the Spirit of God,"[29]

2:15 - Therefore, brethren, stand fast, and hold the traditions which all of you have been taught, whether by word, or our epistle.

Irenaeus Against Heresies Book III
To which course many nations of those barbarians who believe in Christ do assent, having salvation written in their hearts by the Spirit, without paper or ink, and, carefully preserving the ancient tradition,[13]
Tertullian On Monogamy
sy; nor is there any other cause whence they find themselves compelled to deny the Paraclete more than the fact that they esteem Him to be the institutor of a novel discipline, and a discipline which they find most harsh: so that this is already the first ground on which we must join issue in a general handling (of the subject), whether there is room for maintaining that the Paraclete has taught any such thing as can either be charged with novelty, in opposition to catholic tradition,[5]
Tertullian On Modesty
so truly did he turn away from his early opinions: nor did he sin by becoming an emulator not of ancestral but of Christian traditions,[12]
Pope Anterus The Epistle
Therefore, brethren, stand fast and hold the tradition of the apostles and the apostolic seat, "that our Lord Jesus Christ and our Father, which hath loved us, and hath given us everlasting consolation and good hope through grace, may comfort your hearts, and stablish you in every good work and word."[25]