But that hardly accounts for the request of Monica, mother of Augustine, who asked her son, in the fourth century, to remember her soul in his Masses. This would make no sense if she thought her soul would not benefit from prayers, as would be the case if she were in hell or in the full glory of heaven.
Nor does ascribing the doctrine to Gregory explain the graffiti in the catacombs, where Christians during the persecutions of the first three centuries recorded prayers for the dead. Indeed, some of the earliest Christian writings outside the New Testament, like the Acts of Paul and Thecla and the Martyrdom of Perpetua and Felicity (both written during the second century), refer to the Christian practice of praying for the dead. Such prayers would have been offered only if Christians believed in purgatory, even if they did not use that name for it. (See Catholic Answers’ Fathers Know Best tract The Existence of Purgatory for quotations from these and other early Christian sources.)
Why No Protests?
Whenever a date is set for the "invention" of purgatory, you can point to historical evidence to show the doctrine was in existence before that date. Besides, if at some point the doctrine was pulled out of a clerical hat, why does ecclesiastical history record no protest against it?
A study of the history of doctrines indicates that Christians in the first centuries were up in arms (sometimes quite literally) if anyone suggested the least change in beliefs. They were extremely conservative people who tested a doctrine’s truth by asking, Was this believed by our ancestors? Was it handed on from the apostles? Surely belief in purgatory would be considered a great change, if it had not been believed from the first—so where are the records of protests?
They don’t exist. There is no hint at all, in the oldest writings available to us (or in later ones, for that matter), that "true believers" in the immediate post-apostolic years spoke of purgatory as a novel doctrine. They must have understood that the oral teaching of the apostles, what Catholics call tradition, and the Bible not only failed to contradict the doctrine, but, in fact, confirmed it.
http://www.catholic.com/tracts/purgatory
the teaching of purgatory is that all who go there are saved but they are being purged and prepared to be with g
God. As you can see there is talk of it in scripture and even outside of scripture in the 2nd century frescas and even mention of it by Augustine who both Protestants and catholics alike believe that he was one of the early church fathers.
If purgatory wasn't scriptural Augustine would never have mentioned his mother asking him to pray for her soul and he would have admonished her and called her a heretic for even mentioning it.
