Christ, as God, descended to Hades so that we won’t have to

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.

Tertullian
A Treatise on the Soul
Chapter LV

The soul awaits the last judgement after death. Christ preached to the souls in Hades.

But what is that which is removed to Hades after the separation of the body; which is there detained; which is reserved until the day of judgment; to which Christ also, on dying, descended? I imagine it is the souls of the patriarchs.

Tertullian
A Treatise on the Soul
Chapter VII

People continue to exist as disembodied souls after death and before the 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 remainest in existence, and lookest 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. That

Tertullian
The Soul’s Testimony
Chapter IV

Tertullian argues that no one is worthy of heaven on the basis of merit

And yet the latter opinion ought to be discussed, that God conferred divine honours in consideration of meritorious claims. Well, then, if the award was made on such grounds, if heaven was opened to men of the primitive age because of their deserts, we must reflect that after that time no one was worthy of such honour; except it be, that there is now no longer such a place for any one to attain to.

Tertullian
Ad Nationes, Book II
Chapter XIII

The doors of Hell are locked on the inside

I willingly believe that the damned are, in one sense, successful, rebels to the end; that the doors of Hell are locked on the inside. I do not mean that the ghosts may not wish to come out of Hell, in the vague fashion wherein an envious man wishes to be “happy”; but they certainly do not will even the first preliminary stages of that self abandonment through which alone the soul can reach any good. They enjoy forever the horrible freedom they have demanded, and are therefore self-enslaved; just as the blessed, forever submitting to obedience, become through all eternity more and more free.

C.S. Lewis
The Problem of Pain

Virtue is a gift from God — man is not capable.

Consider how [Jesus Christ] teaches us to be humble, by making us see that our virtue does not depend on our work alone but on grace from on high. He commands each of the faithful who prays to do so universally, for the whole world. For he did not say “thy will be done in me or in us”, but “on earth”, the whole earth, so that error may be banished from it, truth take root in it, all vice be destroyed on it, virtue flourish on it, and earth no longer differ from heaven.

St. John Chrysostom
On the Lord’s Prayer

Christ as God awards everlasting punishment or salvation

If so, you have here, O heretics, during your present lifetime, a warning that Moses and the prophets declare one only God, the Creator, and His only Christ, and how that both awards of everlasting punishment and eternal salvation rest with Him, the one only God, who kills and who makes alive.

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXIV

The souls of the departed live on in an intermediate state before heaven

It must therefore be evident to every man of intelligence who has ever heard of the Elysian fields, that there is some determinate place called Abraham’s bosom, and that it is designed for the reception of the souls of Abraham’s children, even from among the Gentiles (since he is “the father of many nations,” which must be classed amongst his family), and of the same faith as that wherewithal he himself believed God, without the yoke of the law and the sign of circumcision. This region, therefore, I call Abraham’s bosom. Although it is not in heaven, it is yet higher than hell, and is appointed to afford an interval of rest to the souls of the righteous, until the consummation of all things shall complete the resurrection of all men with the “full recompense of their reward.”

Tertullian
The Five Books Against Marcion, Book IV
Chapter XXXIV

A millennial kingdom on Earth before reign in heaven

But we do confess that a kingdom is promised to us upon the earth, although before heaven, only in another state of existence; inasmuch as it will be after the resurrection for a thousand years in the divinely-built city of Jerusalem, “let down from heaven,” which the apostle also calls “our mother from above;” and, while declaring that our πολίτευμα , or citizenship, is in heaven, he predicates of it that it is really a city in heaven.

Tertullian
The Five Books Against Marcion, Book III
Chapter XXV