The Father made His Word visible

And for this purpose did the Father reveal the Son, that through His instrumentality He might be manifested to all, and might receive those righteous ones who believe in Him into incorruption and everlasting enjoyment (now, to believe in Him is to do His will); but He shall righteously shut out into the darkness which they have chosen for themselves, those who do not believe, and who do consequently avoid His light. The Father therefore has revealed Himself to all, by making His Word visible to all; and, conversely, the Word has declared to all the Father and the Son, since He has become visible to all. And therefore the righteous judgment of God [shall fall] upon all who, like others, have seen, but have not, like others, believed.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter VI

Souls continue to exist after death

For if He be not the God of the dead, but of the living, yet was called the God of the fathers who were sleeping, they do indubitably live to God, and have not passed out of existence, since they are children of the resurrection.

Irenaeus of Lyons
Against Heresies, Book IV
Chapter V

Bodiless souls exists after death before the resurrection

By these things, then, it is plainly declared that souls continue to exist that they do not pass from body to body, that they possess the form of a man, so that they may be recognized, and retain the memory of things in this world; moreover, that the gift of prophecy was possessed by Abraham, and that each class [of souls] receives a habitation such as it has deserved, even before the judgment.

Irenaeus of Lyons
Against Heresies, Book II
Chapter XXXIV

The soul waits for judgment after death

“ ‘But I do not say, indeed, that all souls die; for that were truly a piece of good fortune to the evil. What then? The souls of the pious remain in a better place, while those of the unjust and wicked are in a worse, waiting for the time of judgment. Thus some which have appeared worthy of God never die; but others are punished so long as God wills them to exist and to be punished.’

Justin Martyr
Dialogue with Trypho
Chapter V

Only two advents. Resurrection and Hell.

For the prophets have proclaimed two advents of His: the one, that which is already past, when He came as a dishonored and suffering Man; but the second, when, according to prophecy, He shall come from heaven with glory, accompanied by His angelic host, when also He shall raise the bodies of all men who have lived, and shall clothe those of the worthy with immortality, and shall send those of the wicked, endued with eternal sensibility, into everlasting fire with the wicked devils.

Justin Martyr
First Apology
Chapter LII

Sensation after death

For while we say that all things have been produced and arranged into a world by God, we shall seem to utter the doctrine of Plato; and while we say that there will be a burning up of all, we shall seem to utter the doctrine of the Stoics: and while we affirm that the souls of the wicked, being endowed with sensation even after death, are punished, and that those of the good being delivered from punishment spend a blessed existence, we shall seem to say the same things as the poets and philosophers.

Justin Martyr
First Apology
Chapter XX