[caww]

after death they undergo purification, so as to achieve the holiness necessary to enter the joy of heaven.

Nope..not true and I've been following this thread....the holiness required is covered under the finished work of Christ and Christ alone....or he wasn't holy "enough" to satsify Gods requirements. There is no middle ground. Either the sacrifice of Christ was "complete" and we are complete in Him or not.... Jesus said......"it is finished"....and it was...is...and forevermore will be who covers all our sins....not in part...but the whole.

[annalex]

holiness required is covered under the finished work of Christ and Christ alone

This is not what 1 Cor. 3 says. It says, some parts of the building have to be burnt off, and only after that he is saved.