Christ, the God-man, descended to the dead

Now although Christ is God, yet, being also man, “He died according to the Scriptures,” and “according to the same Scriptures was buried.” With the same law of His being He fully complied, by remaining in Hades in the form and condition of a dead man; nor did He ascend into the heights of heaven before descending into the lower parts of the earth, that He might there make the patriarchs and prophets partakers of Himself. (This being the case), you must suppose Hades to be a subterranean region, and keep at arm’s length those who are too proud to believe that the souls of the faithful deserve a place in the lower regions. These persons, who are “servants above their Lord, and disciples above their Master,” would no doubt spurn to receive the comfort of the resurrection, if they must expect it in Abraham’s bosom. But it was for this purpose, say they, that Christ descended into hell, that we might not ourselves have to descend thither. Well,

Tertullian
A Treatise on the Soul
Chapter LV

We will be raised in our own bodies to be judged and sentenced irrevocably

Accordingly, God’s judgment will be more full and complete, because it will be pronounced at the very last, in an eternal irrevocable sentence, both of punishment and of consolation, (on men whose) souls are not to transmigrate into beasts, but are to return into their own proper bodies. And all this once for all, and on “that day, too, of which the Father only knoweth;” (only knoweth,) in order that by her trembling expectation faith may make full trial of her anxious sincerity, keeping her gaze ever fixed on that day, in her perpetual ignorance of it, daily fearing that for which she yet daily hopes.

Tertullian
A Treatise on the Soul
Chapter XXXIII

The soul before and after resurrection

Even now, as the matter refers to thy opinion on a point the more closely belonging to thee, in so far as it bears on thy personal well-being, we maintain that after life has passed away thou still remains in existence, and looks forward to a day of judgment, and according to thy deserts art assigned to misery or bliss, in either way of it for ever; that, to be capable of this, thy former substance must needs return to thee, the matter and the memory of the very same human being: for neither good nor evil couldst thou feel if thou wert not endowed again with that sensitive bodily organization, and there would be no grounds for judgment without the presentation of the very person to whom the sufferings of judgment were due.

Tertullian
The Soul’s Testimony
Chapter IV

Traditions of Gehenna and Paradise

Accordingly, we get ourselves laughed at for proclaiming that God will one day judge the world. For, like us, the poets and philosophers set up a judgment-seat in the realms below.  And if we threaten Gehenna, which is a reservoir of secret fire under the earth for purposes of punishment, we have in the same way derision heaped on us. For so, too, they have their Pyriphlegethon, a river of flame in the regions of the dead. And if we speak of Paradise, the place of heavenly bliss appointed to receive the spirits of the saints, severed from the knowledge of this world by that fiery zone as by a sort of enclosure, the Elysian plains have taken possession of their faith.

Tertullian
Apology
Chapter XLVII

The soul is temporarily separated from body before the resurrection

And if we live throughout holily and righteously, we are happy here, and shall be happier after our departure hence; not possessing happiness for a time, but enabled to rest in eternity.

Clement of Alexandria
The Stromata, Book V
Chapter XIV

No soul sleep before the resurrection

For as the Lord “went away in the midst of the shadow of death,” where the souls of the dead were, yet afterwards arose in the body, and after the resurrection was taken up [into heaven], it is manifest that the souls of His disciples also, upon whose account the Lord underwent these things, shall go away into the invisible place allotted to them by God, and there remain until the resurrection, awaiting that event; then receiving their bodies, and rising in their entirety, that is bodily, just as the Lord arose, they shall come thus into the presence of God.

Irenaeus of Lyons
Against Heresies, Book V
Chapter XXXII

 

Men bring Hell on themselves. It’s not a punishment.

Now, good things are eternal and without end with God, and therefore the loss of these is also eternal and never-ending. It is in this matter just as occurs in the case of a flood of light: those who have blinded themselves, or have been blinded by others, are for ever deprived of the enjoyment of light. It is not, [however], that the light has inflicted upon them the penalty of blindness, but it is that the blindness itself has brought calamity upon them: and therefore the Lord declared, “He that believeth in Me is not condemned,” that is, is not separated from God, for he is united to God through faith.

Irenaeus of Lyons
Against Heresies, Book V
Chapter XXVII

Christ’s descent to the dead

It was for this reason, too, that the Lord descended into the regions beneath the earth, preaching His advent there also, and [declaring] the remission of sins received by those who believe in Him. Now all those believed in Him who had hope towards Him, that is, those who proclaimed His advent, and submitted to His dispensations, the righteous men, the prophets, and the patriarchs, to whom He remitted sins in the same way as He did to us, which sins we should not lay to their charge, if we would not despise the grace of God. For as these men did not impute unto us (the Gentiles) our transgressions, which we wrought before Christ was manifested among us, so also it is not right that we should lay blame upon those who sinned before Christ’s coming.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter XXVII