A good friend of mine asked me this question. I would like some of you to help me answer it.
Mark 14:24 And he said to them, “This is my blood of the covenant, which is poured out for many. (E.S.V.). Some translations say “This is my blood of the new covenant.
Question: Since the new covenant is his blood, which is poured out for many (elect) .Does this give evidence that all those in the new covenant are saved?
The question has always been, since God initiated his covenant with Abraham:
is a covenant-person IN covenant with God merely outwardly and formally, or does he also possess true faith within?
There was the "blood of the Old Covenant" too; you can read about it in Hebrews 9:18ff, and Exodus 24. Were all of those folks saved? No, not all were, though formally they were all within Abraham's covenant. Because so many of them had nothing of the substance.
So, regarding the New Covenant: there are people who don't think there is any "formal" or outward aspect to the NC, hence there can't be any participation in it
in any sense by people who aren't saved. They will answer your question positively.
And there are people (on my side) who believe there
continues to be external and internal qualities to Abraham's covenant, as expressed in the New Covenant. All those who participate inwardly and spiritually in the NC are saved.
But, I would argue, there are false professors, baptized people who even partake of the Lord's Supper--drink the cup of the New Covenant, eat and drink condemnation to themselves--they have all these outward marks, and none of the reality. For our part, we would consider this verse to be speaking of such a person:
Heb. 10:29 "Of how much sorer punishment, suppose ye, shall he be thought worthy, who hath trodden under foot the Son of God, and hath counted the blood of the covenant, wherewith he was sanctified, an unholy thing, and hath done despite unto the Spirit of grace?"
That's where we attribute the internal/external distinction. This person had only the outward marks of the New Covenant, like the apostates of the Old Covenant--false professors, each and every one.