Catholics have a strange view of the "forgiveness of sin ".. Their priests "forgive " your sins.. BUT God still demands that you pay for that sin .. the "penance " the priest gave you is not enough.. ...you still need burn time in purgatory for that "forgiven sin"...
This is not what my Bible tells me about Gods forgiveness.. It tells me that Jesus paid the price for my sin...and God has removed it as far as the east to the west (ps 103:12 ) And He will see it no more (Heb.8::12)
If you break my window, I forgive you because I know you are truly sorry, but you still need to buy me a new window.
I suspect, that for those people involved in works based religions, and there are lots of works based religions out there, I think their "burn time" might last just a tad longer than they anticipated, say an eternity longer than they anticipated.