Didache (1st Century) 16:1-7:
"Watch" over your life: do not let "your lamps" go out, and do not keep "your loins ungirded"; but "be ready," for "you do not know the hour when our Lord is coming." Meet together frequently in your search for what is good for your souls, since "a lifetime of faith will be of no advantage" to you unless you prove perfect at the very last. For in the final days multitudes of false prophets and seducers will appear. Sheep will turn into wolves, and love into hatred. For with the increase of iniquity men will hate, persecute, and betray each other. And then the world deceiver will appear in the guise of God's Son. He will work "signs and wonders" and the earth will fall into his hands and he will commit outrages such as have never occurred before. Then mankind will come to the fiery trial "and many will fall away" and perish, "but those who persevere" in their faith "will be saved" by the Curse himself. Then "there will appear the signs" of the Truth: first the sign of stretched-out [hands] in heaven, then the sign of "a trumpet's blast," and thirdly the resurrection of the dead, though not of all the dead, but as it has been said: "The Lord will come and all his saints with him. Then the world will see the Lord coming on the clouds of the sky."
Epistle of Barnabas (1st Century) Chapter 15:
Attend, my children, to the meaning of this expression, “He finished in six days.” This implieth that the Lord will finish all things in six thousand years, for a day is with Him a thousand years.
The Shepherd of Hermas (1st or 2nd Century), Vision 4, Chapter 2:
this beast [that an angel prevented from attacking Hermas] is a type of the great tribulation that is coming. If then ye prepare yourselves, and repent with all your heart, and turn to the Lord, it will be possible for you to escape it, if your heart be pure and spotless, and ye spend the rest of the days of your life in serving the Lord blamelessly.
Testaments of the Twelve Patriarchs (1st or 2nd Century), Testament 3, Paragraph 4:
Now, therefore, know that the Lord will execute judgment upon the sons of men; because when the rocks are rent, and the sun quenched, and the waters dried up, and the fire trembling, and all creation troubled, and the invisible spirits melting away, and the grave spoiled in the suffering of the Most High, men unbelieving will abide in their iniquity, therefore with punishment shall they be judged.
Testaments of the Twelve Patriarchs (1st or 2nd Century), Testament 4, Paragraph 25:
And after these things shall Abraham and Isaac and Jacob arise unto life, and I and my brethren will be chiefs, even your sceptre in Israel: Levi first, I the second, Joseph third, Benjamin fourth, Simeon fifth, Issachar sixth, and so all in order. And the Lord blessed Levi; the Angel of the Presence, me; the powers of glory, Simeon; the heaven, Reuben; the earth, Issachar; the sea, Zebulun; the mountains, Joseph; the tabernacle, Benjamin; the lights of heaven, Dan; the fatness of earth, Naphtali; the sun, Gad; the olive, Asher: and there shall be one people of the Lord, and one tongue; and there shall no more be a spirit of deceit of Beliar, for he shall be cast into the fire for ever. And they who have died in grief shall arise in joy, and they who have lived in poverty for the Lord's sake shall be made rich, and they who have been in want shall be filled, and they who have been weak shall be made strong, and they who have been put to death for the Lord's sake shall awake in life. And the harts of Jacob shall run in joyfulness, and the eagles of Israel shall fly in gladness; but the ungodly shall lament, and sinners all weep, and all the people shall glorify the Lord for ever.
Testaments of the Twelve Patriarchs (1st or 2nd Century), Testament 7, Paragraph 5:
and the saints shall rest in Eden, and the righteous shall rejoice in the new Jerusalem, which shall be unto the glory of God for ever and ever. And no longer shall Jerusalem endure desolation, nor Israel be led captive; for the Lord shall be in the midst of her, dwelling among men, even the Holy One of Israel reigning over them in humility and in poverty; and he who believeth on Him shall reign in truth in the heavens.
The Christian Sibylline Oracles (2nd Century), Book 3: 76-111:
From the Sebastenes Beliar shall come
Hereafter, and the height of hills shall he
Establish, and shall make the sea stand still
And the great fiery sun and the bright moon
And he shall raise the dead, and many signs
Work before men: but nothing shall be brought
By him unto completion but deceit,
And many mortals shall be lead astray
Hebrews both true and choice, and lawless men
Besides who never gave ear to God's word.
But when the threatenings of the mighty God
Shall draw near, and a flaming power shall come
By billow to the earth, it shall consume
Both Beliar and all the haughty men
Who put their trust in him. And thereupon
Shall the whole world be governed by the hands
Of a woman and obedient everywhere.
Then when a widow shall o'er all the world
Gain the rule, and cast in the mighty sea
Both gold and silver, also brass and iron
Of short lived men into the deep shall cast,
Then all the elements shall be bereft
Of order, when the God who dwells on high
Shall roll the heaven, even as a scroll is rolled;
And to the mighty earth and sea shall fall
The entire multiform sky; and there shall flow
A tireless cataract of raging fire,
And it shall burn the land, and burn the sea,
And heavenly sky, and night, and day, and melt
Creation itself together and pick out
What is pure. No more laughing spheres of light,
Nor night, nor dawn, nor many days of care,
Nor spring, nor winter, nor the summer-time,
Nor autumn. And then of the mighty God
The judgment midway in a mighty age
Shall come, when all these things shall come to pass.
The Apocalypse of Peter (Early 2nd Century):
And when they (Israel) shall perceive the wickedness of their deeds they shall turn away after them and deny him [whom our fathers did praise], even the first Christ whom they crucified and therein sinned a great sin. But this deceiver is not the Christ. [something is wrong here: the sense required is that Israel perceives the wickedness of antichrist and does not follow him.] And when they reject him he shall slay with the sword, and there shall be many martyrs. Then shall the twigs of the fig-tree, that is, the house of Israel, shoot forth: many shall become martyrs at his hand. Enoch and Elias shall be sent to teach them that this is the deceiver which must come into the world and do signs and wonders to deceive. And therefore shall they that die by his hand be martyrs, and shall be reckoned among the good and righteous martyrs who have pleased God in their life…And this shall come at the day of judgement upon them that have fallen away from faith in God and that have committed sin: Floods (cataracts) of fire shall be let loose; and darkness and obscurity shall come up and clothe and veil the whole world and the waters shall be changed and turned into coals of fire and all that is in them shall burn, and the sea shall become fire. Under the heaven shall be a sharp fire that cannot be quenched and floweth to fulfil the judgement of wrath. And the stars shall fly in pieces by flames of fire, as if they had not been created and the powers (firmaments) of the heaven shall pass away for lack of water and shall be as though they had not been. And the lightnings of heaven shall be no more, and by their enchantment they shall affright the world (probably: The heaven shall turn to lightning and the lightnings thereof shall affright the world. The spirits also of the dead bodies shall be like unto them (the lightnings?) and shall become fire at the commandment of God.
And so soon as the whole creation dissolveth, the men that are in the east shall flee unto the west, unto the east; they that are in the south shall flee to the north, and they that are in the south. And in all places shall the wrath of a fearful fire overtake them and an unquenchable flame driving them shall bring them unto the judgement of wrath, unto the stream of unquenchable fire that floweth, flaming with fire, and when the waves thereof part themselves one from another, burning, there shall be a great gnashing of teeth among the children of men.
Then shall they all behold me coming upon an eternal cloud of brightness: and the angels of God that are with me shall sit (prob. And I shall sit) upon the throne of my glory at the right hand of my Heavenly Father; and he shall set a crown upon mine head. And when the nations behold it, they shall weep, every nation apart.
Then shall he command them to enter into the river of fire while the works of every one of them shall stand before them (something is wanting) to every man according to his deeds. As for the elect that have done good, they shall come unto me and not see death by the devouring fire. But the unrighteous the sinners, and the hypocrites shall stand in the depths of darkness that shall not pass away, and their chastisement is the fire, and angels bring forward their sins and prepare for them a place wherein they shall be punished for ever (every one according to his transgression).
Uriel (Urael) the angel of God shall bring forth the souls of those sinners (every one according to his transgression: perhaps this clause should end the preceding paragraph: so Grebaut takes it) who perished in the flood, and of all that dwelt in all idols, in every molten image, in every (object of) love, and in pictures, and of those that dwelt on all hills and in stones and by the wayside, whom men called gods: they shall burn them with them (the objects in which they dwelt, or their worshippers?) in everlasting fire; and after that all of them with their dwelling places are destroyed, they shall be punished eternally. (Begins to talk about what Hell is like.)
Irenaeus speaking about Papias (Mid-2nd Century) 6:
…some other things of a more fabulous nature. Amongst these he says that there will be a millennium after the resurrection from the dead, when the personal reign of Christ will be established on this earth.
The Epistle of the Apostles (Mid-2nd Century) Chapter 16-17:
Verily I [Jesus] say unto you, I shall come like the sun when it is risen, and my brightness will be seven times the brightness thereof! The wings of the clouds shall bear me in brightness, and the sign of the cross shall go before me, and I shall come upon earth to judge the quick and the dead.
We said unto him: Lord, after how many years shall this come to pass? He said unto us: When the hundredth part and the twentieth part is fulfilled, between the Pentecost and the feast of unleavened bread, then shall the coming of my Father be (so Copt.: When an hundred and fifty years are past, in the days of the feast of Passover and Pentecost, &c., Eth.: . . . (imperfect word) year is fulfilled, between the unleavened bread and Pentecost shall be the coming of my Father, Lat.).
The Epistle of the Apostles (Mid-2nd Century) Chapters 34-38:
And we said unto him again: Lord, so many great things hast thou told us and revealed unto us as never yet were spoken, and in all hast thou given us rest and been gracious unto us. After thy resurrection thou didst reveal unto us all things that we might be saved indeed; but thou saidst unto us only: There shall be wonders and strange appearances in heaven and on earth before the end of the world come. Tell us now, how shall we perceive it? And he answered us: I will teach it you; and not that which shall befall you only, but them also whom ye shall teach and who shall believe, as well as them who shall hear that man and believe on me. In those years and days shall it come to pass.
And we said again unto him: Lord, what shall come to pass? And he said unto us: Then shall they that believe and they that believe not hear (see, Eth.) a trumpet in the heaven, a vision of great stars which shall be seen in the day, wonderful sights in heaven reaching down to the earth; stars which fall upon the earth like fire, and a great and mighty hail of fire (a star shining from the east unto this place, like unto fire, Eth. 2). The sun and the moon fighting one with the other, a continual rolling and noise of thunders and lightnings, thunder and earthquake; cities falling and men perishing in their overthrow, a continual dearth for lack of rain, a terrible pestilence and great mortality, mighty and untimely, so that they that die lack burial: and the bearing forth of brethren and sisters and kinsfolk shall be upon one bier. The kinsman shall show no favour to his kinsman, nor any man to his neighbour. And they that were overthrown shall rise up and behold them that overthrew them, that they lack burial, for the pestilence shall be full of hatred and pain and envy: and men shall take from one and give to another. And thereafter shall it wax yet worse than before. (Bewail ye them that have not hearkened unto my commandments, Eth. 2.)
Then shall my Father be wroth at the wickedness of men, for many are their transgressions, and the abomination of their uncleanness weigheth heavy upon them in the corruption of their life.
And we asked him: What of them that trust in thee? He answered and said unto us: Ye are yet slow of heart; and how long? Verily I say unto you, as the prophet David spake of me and of my people, so shall it be (?) for them also that believe on me. But they that are deceivers in the world and enemies of righteousness, upon them shall come the fulfilment of the prophecy of David, who said: Their feet are swift to shed blood, their tongue uttereth slander, adders' poison is under their lips. I behold thee companying with thieves, and partaking with adulterers, thou continuest speaking against thy brother and puttest stumbling-blocks before thine own mother's son. What thinkest thou, that I shall be like unto thee? Behold now how the prophet of God hath spoken of all, that all things may be fulfilled which he said aforetime.
And again we said unto him: Lord, will not then the nations say: Where is their God? And he answered and said unto us: Thereby shall the elect be known, that they, being plagued with such afflictions, come forth. We said: Will then their departure out of the world be by a pestilence which giveth them pain? He answered us: Nay, but if they suffer such affliction, it will be a proving of them, whether they have faith and remember these my sayings, and fulfil my commandments. These shall arise, and short will be their expectation, that he may be glorified that sent me, and I with him. For he hath sent me unto you to tell you these things; and that ye may impart them unto Israel and the Gentiles and they may hear, and they also be redeemed and believe on me and escape the woe of the destruction. But whoso escapeth from the destruction of death, him will they take and hold him fast in the prison-house in torments like the torments of a thief.
And we said unto him: Lord, will they that believe be treated like the unbelievers, and wilt thou punish them that have escaped from the pestilence? And he said unto us: If they that believe in my name deal like the sinners, then have they done as though they had not believed. And we said again to him: Lord, have they on whom this lot hath fallen no life? He answered and said unto us: Whoso hath accomplished the praise of my Father, he shall abide in the resting-place of my Father.
Then said we unto him: Lord, teach us what shall come to pass thereafter? And he answered us: In those years and days shall war be kindled upon war; the four ends of the earth shall be in commotion and fight against each other. Thereafter shall be quakings of clouds (or, clouds of locusts), darkness, and dearth, and persecutions of them that believe on me and against the elect. Thereupon shall come doubt and strife and transgressions against one another. And there shall be many that believe on my name and yet follow after evil and spread vain doctrine. And men shall follow after them and their riches, and be subject unto their pride, and lust for drink, and bribery, and there shall be respect of persons among them.
But they that desire to behold the face of God and respect not the persons of the rich sinners, and are not ashamed before the people that lead them astray, but rebuke (?) them, they shall be crowned by the Father. And they also shall be saved that rebuke their neighbours, for they are sons of wisdom and of faith. But if they become not children of wisdom, whoso hateth his brother and persecuteth him and showeth him no favour, him will God despise and reject.
(Copt. resumes.) But they that walk in truth and in the knowledge of the faith, and have love towards me--for they have endured insult--they shall be praised for that they walk in poverty and endure them that hate them and put them to shame. Men have stripped them naked, for they despised them because they continued in hunger and thirst, but after they have endured patiently, they shall have the blessedness of heaven, and they shall be with me for ever. But woe unto them that walk in pride and boasting, for their end is perdition.
Justin Martyr’s Dialog with Trypho (Mid-2nd Century) Chapter 80:
If you have fallen in with some who are called Christians, but who do not admit this[truth], and venture to blaspheme the God of Abraham, and the God of Isaac, and the God of Jacob; who say there is no resurrection of the dead, and that their souls, when they die, are taken to heaven; do not imagine that they are Christians…But I and others, who are right-minded Christians on all points, are assured that there will be a resurrection of the dead, and a thousand years in Jerusalem, which will then be built, adorned, and enlarged, the prophets Ezekiel and Isaiah and others declare.
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Find more of what the early Christians thought on my Christian History page!