Early Church Fathers on Purgatory. . .

As we continue our study of the Early Church Fathers (ECFs), we see that, regardless of what many non-Catholics believe, the Church has always taught about the reality of Purgatory:

Clement of Alexandria
He (the believer) is tortured then still more, not yet attaining what he sees others have acquired. The greatest torments are assigned to the believer, for God's righteousness is good, and His goodness righteous, and though these punishments cease in the course of the expiation and purification of each one, "yet" etc. [A.D. 150-215]). 

Origen
If a man departs this life with lighter faults, he is condemned to fire which burns away the lighter materials, and prepares the soul for the kingdom of God, where nothing defiled may enter. [A.D. 185-232]).

Cyprian
It is one thing, tortured by long suffering for sins, to be cleansed and long purged by fire; another to have purged all sins by suffering. It is one thing, in fine, to be in suspense till the sentence of God at the Day of Judgment; another to be at once crowned by the Lord. [A.D. 253]).

John Chrysostom
Let us help and commemorate them. If Job's sons were purified by their father's sacrifice [Job l:5), why would we doubt that our offerings for the dead bring them some consolation? Let us not hesitate to help those who have died and to offer our prayers for them. [A.D. 392]).

Augustine
That there should be some fire even after this life is not incredible, and it can be inquired into and either be discovered or left hidden whether some of the faithful may be saved, some more slowly and some more quickly in the greater or lesser degree in which they loved the good things that perish, through a certain purgatorial fire. [A.D. 421]).