God's goodness surpasses all imagination; but at the same time, God's chastisement is not a violation of His goodness.
Hebrews 12:5
"For the Lord disciplines the one He loves,
and He chastises everyone He receives as a son."
(This whole passage, in context, is tremendous)
Zecharia 3:19
This third [of the people]I will put into the fire;
I will refine them like silver
and test them like gold.
They will call on my name
and I will answer them;
I will say, 'They are my people,'
and they will say, 'The LORD is our God.'
God's discipline and chastisement is a comforting reality as it testifies that we are indeed HIS children. But that only happens in this life, the mortal coil we live in because it works to conform us into the image of Christ. Once we die, there is no more work left to do - we are changed, we are in the presence of God, we have the mind of Christ. What does "temporal" punishment in the in-between place called Purgatory accomplish? We don't take our human flesh and blood with us into eternity. We will be given glorified bodies like unto Christ's glorified body. Our soul and spirit has been cleansed from all unrighteousness through faith in Christ and we are clothed in HIS righteousness, not our own.
So, what could possibly be the point of Purgatory after we die? Is it a place where God gets even with us? He's already gotten even when He gave His only begotten Son to suffer and die in our place and we received Him through faith. We are told repeatedly that every hidden thing will be exposed. Every idle word will be accounted for and we will give an account for what we have done whether good or bad. I imagine for some of us, that session might take a bit longer than for others. Could this be that "my whole life flashed before my eyes" event some people in NDE's talk about? Maybe. We will experience rewards and loss of rewards and whatever rewards we do get, Scripture says we will place at the feet of Jesus because He is worthy to receive all glory and honor and praise. No good we have done could have been done without Him working in us. And all our sins and iniquities will be done away with - He says He will remember them no more. I imagine there will be some sorrow and shame for the wrongs we have done but He promises that He will wipe every tear from our eyes and there will not be anymore crying. I just know that God is just and holy and righteous altogether. And I rest in the knowledge that: