LARobert – I like your response. I just want to add one more thing, but I’m gonna quote from Catholic Answers
“…..The purification is necessary because, as Scripture teaches, nothing unclean will enter the presence of God in heaven (Rev. 21:27) and, while we may die with our mortal sins forgiven, there can still be many impurities in us, specifically venial sins and the temporal punishment due to sins already forgiven……
…..The Fundamentalist resistance to the biblical doctrine of purgatory presumes there is a contradiction between Christ’s redeeming us on the cross and the process by which we are sanctified. There isn’t. And a Fundamentalist cannot say that suffering in the final stage of sanctification conflicts with the sufficiency of Christ’s atonement without saying that suffering in the early stages of sanctification also presents a similar conflict. The Fundamentalist has it backward: Our suffering in sanctification does not take away from the cross. Rather, the cross produces our sanctification, which results in our suffering, because “[f]or the moment all discipline seems painful rather than pleasant; later it yields the peaceful fruit of righteousness” (Heb. 12:11). …..
…..Purgatory makes sense because there is a requirement that a soul not just be declared to be clean, but actually be clean, before a man may enter into eternal life. After all, if a guilty soul is merely “covered,” if its sinful state still exists but is officially ignored, then it is still a guilty soul. It is still unclean.
Catholic theology takes seriously the notion that “nothing unclean shall enter heaven.” From this it is inferred that a less than cleansed soul, even if “covered,” remains a dirty soul and isn’t fit for heaven. It needs to be cleansed or “purged” of its remaining imperfections. The cleansing occurs in purgatory. Indeed, the necessity of the purging is taught in other passages of Scripture, such as 2 Thessalonians 2:13, which declares that God chose us “to be saved through sanctification by the Spirit.” Sanctification is thus not an option, something that may or may not happen before one gets into heaven. It is an absolute requirement, as Hebrews 12:14 states that we must strive “for the holiness without which no one will see the Lord.” ”
Also from the Catholic Catechism we read:
“III. THE FINAL PURIFICATION, OR PURGATORY
1030 All who die in God’s grace and friendship, but still imperfectly purified, are indeed assured of their eternal salvation; but after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven.
1031 The Church gives the name Purgatory to this final purification of the elect, which is entirely different from the punishment of the damned. The Church formulated her doctrine of faith on Purgatory especially at the Councils of Florence and Trent. The tradition of the Church, by reference to certain texts of Scripture, speaks of a cleansing fire:
As for certain lesser faults, we must believe that, before the Final Judgment, there is a purifying fire. He who is truth says that whoever utters blasphemy against the Holy Spirit will be pardoned neither in this age nor in the age to come. From this sentence we understand that certain offenses can be forgiven in this age, but certain others in the age to come.
1032 This teaching is also based on the practice of prayer for the dead, already mentioned in Sacred Scripture: “Therefore Judas Maccabeus] made atonement for the dead, that they might be delivered from their sin.” From the beginning the Church has honored the memory of the dead and offered prayers in suffrage for them, above all the Eucharistic sacrifice, so that, thus purified, they may attain the beatific vision of God. The Church also commends almsgiving, indulgences, and works of penance undertaken on behalf of the dead:
Let us help and commemorate them. If Job’s sons were purified by their father’s sacrifice, 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.”