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." http://www.catholic.com/tracts/purgatory
But which is contradicted by Scripture which the RC abuses in attempting to support traditions of men! Scripture (Peter no less) teaches that God purifies the heart by faith, ("purifying their hearts by faith." - Acts 15:9) and that even the immature Corinthians were washed, sanctified, and justified in the name of the Lord Jesus, and by the Spirit of our God. (1 Corinthians 6:11)
And that while CA invokes 2 Thessalonians, they were told that they would all be with the Lord is He returned in their lifetime. (1Ths. 4:17)
Finally, Hebrews 12:14 does not say to strive for "that" holiness, as if a certain level was to be met, but to follow after holiness, which is required to see the Lord, but which is consistent with faith, the keeping of which is the theme of Hebrews, (Heb. 10:17) and which holiness these Hebrews were told they already possessed, and could had direct access into the holy of holies by the sinless shed blood of the Lord Jesus.
By the which will we are sanctified through the offering of the body of Jesus Christ once for all. And every priest standeth daily ministering and offering oftentimes the same sacrifices, which can never take away sins: But this man, after he had offered one sacrifice for sins for ever, sat down on the right hand of God; From henceforth expecting till his enemies be made his footstool. For by one offering he hath perfected for ever them that are sanctified. (Heb 10:10-14)
Having therefore, brethren, boldness to enter into the holiest by the blood of Jesus, By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh; (Heb 10:19-20)
Thus they are exhorted to pursue what they already had, which is mark of true faith. We see this in Phil. 3, in which Paul, who states that if he was to leave this world then He would be with the Lord, (For I am in a strait betwixt two, having a desire to depart, and to be with Christ; which is far better: (Philippians 1:23) but expresses how much he wanted to attain perfection in this life, "the prize of the high calling of God in Christ Jesus," and to now be like a resurrected believer, while pointing to that resurrection as being the next transformative event, "Who shall change our vile body, that it may be fashioned like unto his glorious body, according to the working whereby he is able even to subdue all things unto himself." (Philippians 3:21)
Purgatory is simply not there.
Except that when a person is born again, born from above, he is given a NEW nature, a pure, sinless spiritual nature.
When this body of flesh dies, then all that's left is the new, pure, spiritual nature. The old is dead so there is nothing left of it to be judged on..