A reader writes:
I am currently trying to explain the Catholic position on purgatory to a co-worker. I have given him some info I found on the internet. He looked it over and discussed with a fellow church member. He came back with, “if you believe in purgatory, then you are saying that Jesus dying on the cross was not good enough to save us!” How do I respond?
The purpose of purgatory is to purify us so that we are thoroughly holy and thus fit for heaven. It is part of the process by which we gain "the holiness without which no one will see the Lord" (Heb. 12:14).
But the process of purification doesn’t start in purgatory. It starts in this life, and in Protestant circles it’s known as sanctification. (Catholics also use this term, though not always in exactly the same fashion; the term justification is also used in both circles though not always in the same ways.)
Now, where does sanctification come from? Is it something God gives us by his grace or something that happens apart from his grace?
Protestants will agree with Catholics that it is the product of God’s grace in our lives.
But why is God giving us this grace? Is it because of what his Son did on the Cross or is it separate from that?
Once again, Protestants will agree with Catholics that it is because of what Christ did on the Cross that God sanctifies us.
So sanctification–the process of being made holy–is something that happens to us only because of Christ’s death on the Cross.
Sanctification–including the final stage of sanctification in purgatory–thus presupposes the sufficiency of Christ’s sacrifice. It is so sufficient that it is not only enough to justify us but enough to sanctify us as well. The difference is that (to use language in a Protestant way) justification is something that happens at the beginning of the Christian life while sanctification is something that happens over the course of it.
So that’s what I’d tell him.

