The vast majority of Protestant churches teach eternal salvation.
As a matter of Doctrine, Lutherans, Methodists, Episcopalians, Anglicans, Assemblies of God, all teach a falling from grace is possible. In the Catholic view, eternal life, which is irrevocable, is the inheritance that we recieve in Heaven. The Indwelling of the Holy Spirit, given freely by grace through Christ, is what allows us to enter into Heaven and get the inheritance that is ours as adopted sons of the Father through Christ, the only Son.
Romans 11:17-23
If some of the branches have been broken off, and you, though a wild olive shoot, have been grafted in among the others and now share in the nourishing sap from the olive root, do not boast over those branches. If you do, consider this: You do not support the root, but the root supports you. You will say then, "Branches were broken off so that I could be grafted in." Granted. But they were broken off because of unbelief, and you stand by faith. Do not be arrogant, but be afraid. For if God did not spare the natural branches, he will not spare you either.
Consider therefore the kindness and sternness of God: sternness to those who fell, but kindness to you, provided that you continue in his kindness. Otherwise, you also will be cut off. And if they do not persist in unbelief, they will be grafted in, for God is able to graft them in again.
Galatians 5:1-4
It is for freedom that Christ has set us free. Stand firm, then, and do not let yourselves be burdened again by a yoke of slavery. Mark my words! I, Paul, tell you that if you let yourselves be circumcised, Christ will be of no value to you at all. Again I declare to every man who lets himself be circumcised that he is obligated to obey the whole law. You who are trying to be justified by law have been alienated from Christ; you have fallen away from grace.
Notice that in both cases Paul is addressing people who have a faith in Christ, a faith that has freed them from their bonds of slavery and has grafted them into the vine of their salvation. Yet, Paul tells even those with a faith that has given them new life that they can be cut off, that they can fall from grace.
But this is off topic...would you mind starting a new thread for that, or maybe reading a few of the other OSAS / OSNAS threads that have been active lately?
My Fiancee's brother killed himself about three years ago. It was ruled accidental, but due to his mental state there was some debate. He was manic depressive / bi-polar and on heavy medication at the time of his death. Since her family had moved around a lot during her youth, he was my fiancee's best friend, as well as brother. His death effected her greatly.
During the short weeks after his death, she began hearing from members of the congregation of the Baptist Church she attended. Nice little comments like, "I'm sorry you're brother is in Hell," almost drove her over the edge. She left that congregation and never returned. I am glad she had the faith to leave, instead of sticking around to be tortured like that.
I find it odd that while her Baptist Church condemned him, my Catholic Church offered prayers for his rest with Christ. Growing up a Protestant I would have guessed it would be the other way around. I was pleased it was not.
Let us all remember those who have taken their own lives in our prayers tonight.
Neal