For context, this is what I said:
"By definition, His children ARE saved.
Jn 1:12 - But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name,
Gal 3:26 - For you are all sons of God through faith in Christ Jesus."
Your reference to Eph 1:4 reveals how much you've misunderstood the verse.
So, let's look at it.
"just as He chose us in Him before the foundation of the world, that we would be holy and blameless before Him. In love"
OK, the first question is to whom does the "us" belong to? iow, who are the "us"?
Well, Paul clearly notes who the "us" are, in v.19a - and what is the surpassing greatness of His power toward us who believe.
OK. So, the "us" of v.4 is the same "us who believe" in v.19.
So, Eph 1:4 does not claim that God chooses who will believe. Rather, He chooses believers.
Next question: what did he chose believers for? That is answered in v.4b - "that we would be holy and blameless before Him".
The International Study Bible Encyclopedia describes election as being chosen for special privilige and service. There are at least (as far as I've found) 6 different categories of what the Bible describes as being "the elect" or having been elected:
Jesus Christ Isa 42:1
elect angels 1 Tim 5:21
nation of Israel Amos 3:2
NT believers Eph 1:4
the 12 disciples, which included Judas, an unbeliever John 6:70
Paul Acts 9:15
Each and every category fits the ISBE description of "election". Even Judas was chosen for special privilege (being in the presence of the Messiah) and service.
So, the phrase "that we should be holy and blameless" doesn't refer to the status as being a believer, which is the common response from Calvinists, but the PURPOSE for which God chose believers in the first place.
We know this from the other verses that say basically the same thing; that believers have been chosen to be holy.
Eph 5:27 - and to present her to himself as a radiant church, without stain or wrinkle or any other blemish, but holy and blameless.
Phil 2:15 - so that you may become blameless and pure, children of God without fault in a crooked and depraved generation, in which you shine like stars in the universe
Col 1:10 - And we pray this in order that you may live a life worthy of the Lord and may please him in every way: bearing fruit in every good work, growing in the knowledge of God To live a life worthy of the Lord is to be holy and blameless, obviously.
Col 3:5 - Put to death, therefore, whatever belongs to your earthly nature: sexual immorality, impurity, lust, evil desires and greed,which is idolatry. It is only by putting to death these things that believers will become holy and blameless
1 Thess 3:13 - May he strengthen your hearts so that you will be blameless and holy in the presence of our God and Father when our Lord Jesus comes with all his holy ones.
Please note that all of the phrases "holy and blameless" or "blameless and holy" are subjunctive moods and indicate that this is WHAT believers are SUPPOSED to be. Not that all of them will be. But are supposed to be.
So please don't try to argue that Eph 1:4 is God choosing who will be a believer because the phrase "holy and blameless" indicates a believer.
I've just proven from Scripture that being holy and blameless is the goal of the believer's life. It's what we are to be. As believers.