Some would teach that we receive a once for all forgiveness either at the point of belief or the point of baptism. Is this true? If so, it would essentially lead to OSAS. In fact, OSAS (Once-Saved, Always-Saved) can essentially be seen as nothing other than the belief in a once for all forgiveness. So, what can we say against this view?
Proponents of OSAS may tell us that we don’t need priests or clergy to continually reapply the sacrifice of Christ to us, and that the Lord’s Supper and church attendance are not “means of grace” which do so either. Well, that’s true. But that does not mean that the sacrifice of Christ is not reapplied in some other way.
Christ himself taught us to pray “forgive us our sins as we forgive those who sin against us.”
John (everything I refer to from John here is in 1st John) also taught us that as we continue walking in the light the blood of Christ continues to cleanse us. John also taught that if we see a brother commit a sin that is “not unto death” (i.e. not a mortal sin) then we can pray for him and he will be forgiven, while he says concerning the “sin unto death” that “I do not say you should pray about that” (i.e. my prayer won’t help anyone else if its a mortal sin since they have to pray about that one themselves).
How can these things be if, as they claim, forgiveness is a once for all event? Under their system both Christ himself and the apostle John would be heretics. How can that be?
So there is a reapplication of Christ’s sacrifice; yet this is not under the control of an institution. This is a matter of us continuing to walk with God and to pray for forgiveness. This obviously also means that OSAS and similar acronyms or phrases that refer to the same basic idea are false doctrines, because if we were just forgiven once for all, Jesus would not have to taught us to continually pray for forgiveness, nor would John speak of a continual cleansing, nor would John tell us to pray for our fellow Christians when we see them commit sins that are not mortal sins.