Justification by Grace, or Works, or Both

Joshua brought an interesting comment on my sanctification post. He suggests that because we are actively involved in sanctification, we must have been, or be actively involved in justification. A similar arguement as my other friend who said that because we were saved by faith and no works of our own, sanctification is a proccess of simply allowing God to continue his work. They come from two different sides, but the same logic. Last post I dealt with our part in sanctification, so next post I will search the scriptures to look at justification. If we play a part in being reconciled to God through Jesus Christ, then do we play a part in maintaining our salvation. Now I did poing out that we are actively involved in our sanctification, I would not go as so far as to say that we are responsible to keep our salvation intact. I believe if it took anything on your part to be saved, then it is reasonable to assume there is something you could do to lose it. A chain is only as good as it's weakest link. I believe the apostles argued there was nothing that we could do to lose salvation, and anyone who left the church, was never among them to begin with. In fact this was a teaching the apostles used to bolster the faith of the believers and allowed them to stay strong under persecution. This is the old "once saved, always saved debate". I believe it's the logical extension of armenianism vs. calvinism. A good book on this topic is "Debating Calvinism" with Dr. James White and Dave Hunt.