"It is appointed to man once to die and then the judgement." Hebrews 9:27
If we have to go to a place to pay for our own sins that weren't covered on this earth or to "cleanse" ourselves in preparation for heaven....
....then that means that Jesus Christ's atonement does NOT cover our sins in full and his shed blood is not cleansing.
And that is a lie
Dear plain Jayne, I'm sorry but you misunderstand some very important truths. First, purgatory did not exist and could not exist before the shed blood of Jesus on the Cross. It is only through His perfect once-for-all sacrifice that purgatory has any meaning or effect on human souls. We do not "pay for our own sins" in purgatory - rather, our souls are made clean, made pure in purgatory through the work of God in us to empty us, to purge us, of all remaining
clinging to sins and impurities and disordered self-love which we died still
loving. In analogy, the fires of purgatory burn away the impurity of impure desires, and refine our souls as if gold having imperfections, which need to be burned away to leave only pure, pure gold worthy of God.
A Christian who has love for God does not "love sin" intentionally, yet many - most - still sin! How can this be? He
does love sin - some sins in particular - even though
he may hate the fact that he does. He does not
want to want to sin, yet he sins! How can this be? This is the fact, because even though the blood of Jesus has the power to cleanse him of all sin, he himself personally has
not rejected and become free of
all sin. He still sins. This condition is NOT acceptable to enter the presence of the all-holy God. NOTHING unclean can enter the presence of God. (Rev 21:27)
The elect will enter the presence of God, by the Blood - the love - of Christ, but many may not do so immediately after death, but rather only after they have been finally and completely freed from all impurity. God gives us time on earth to
fully offer ourselves to Him, but many do not fully do so. Thus purgatory, to finish passively (here, God is the active agent) what should have been done actively with our own wills while on earth.
That is the Truth.