I didn't say "nothing about purging". I said nothing about "purgatory".
Specifically I said, "Nothing about a place that believers go immediately after death to have their venial sins "purged" before they can go to heaven."
The purging is of our works that are made of wood, hay, and stubble.
Here are some differences in the Catholic concept of Purgatory and 1 Corth 3:10-15
1. What takes place in the passage takes place on "the day" of final judgement, not immediately after death.
2. The passage describes an action by God, not a specific place
3. The passage is about judging our works, not about our sins
4. The passage is about how our works will either be lasting and rewarded or unworthy, temporary, and destroyed. Sin isn't mentioned in the passage at all.
The first concepts of purgatory did not come from Christianity or Judaism. It came from Greek Philosophy. The two most prominent passages about a type of purgatory is from Plato in The Republic Book X and in Virgil's Aeneid. The concept crept its way in the Christianity as more Romans and Hellenized Jews became converts.
The concept seemed to be taking hold in the 4th and 5th Century. Even Saint Augustine isn't sure about it.
It is a matter that may be inquired into, and
either ascertained or left doubtful, whether some
believers shall pass through a kind of purgatorial fire” Augustine
Handbook of Faith, Hope, and Love Chapter 69
“But if it be said that in the interval of time between the death of this body and that last day of judgment and retribution which shall follow the resurrection, the bodies of the dead shall be exposed to a fire of such a nature that it shall not affect those who have not in this life indulged in such pleasures and pursuits as shall be consumed like wood, hay, stubble…this I do not contradict, because possibly it is true” Augustine City of God Book 21, Chapter 26
So we see that in the lifetime of Augustine Purgatory was starting to be preached and great thinkers like Augustine were trying to figure out if it was true or not. If nothing else, this shows that purgatory was not part of the deposit of faith taught by the Apostles and handed on to the church.
I personally believe it came from influential theologians and bishops who were influenced by Greek Philosophy, they adapted the Greek concept of Purgatory to Christianity, and convinced others to accept purgatory as fact.