I do not think the grammar allows the possiblity that the Calvinist view is valid. I am not removing words, I am attempting to show through sanctification and faith is tied to chose, not salvation. If you do not know how prepositional phrases drop out which showing the main idea of the sentence, there is nothing I can say.
You can't always do that to prepositional phrases. You are talking about independent clauses. This is a dependent clause. Also, "through" is a preposition as well, along with "by" and "in." So I guess we can take that out too. :rolleyes"
Also, you didn't give how you would word with "proper grammar" the sentence in my view. How would you word that?
What you need to do is determine what the propositions modify. Is it an adverbial phrase or an adjective phrase? If it is an adverbial, it would modify "choosing," but if it is an adjective, it would modify "salvation."
I say it's an adjective phrase.
I saw something in the corder of the room.
Here we have to propositional phrases. The first one, "in the corner," is an adjective phrase. It modifies the noun "something." The second phrase, "of the room" modifies the noun "corner."
Here in the passage, we have an adjective phrase.
God has chosen you from the beginning for salvation through sanctification by the Spirit and faith in the truth.
"from the beginning" (or "as the firstfruits") modifies "chosen"
"for salvation" would modify the verb "chosen."
"through sanctification" would modify the noun "salvation"
"by the spirit" would modify "sanctification"
"[through] faith" would modify "salvation"
"in the truth" would modify "faith"
In addition, how is sanctification and faith tied to choosing. It says "through" (meaning, by means of) sanctification and belief. How does that work in your view if it isn't about salvation? On what grounds do you say that this is an adverbial phrase that modifies "chosen" instead of the adjacent noun "salvation"? Also, who is being sanctified? God is the one choosing here. He has chosen through sanctification? Who is being sanctified and what does it mean? What does "belief in the truth" mean if not for salvation but election. Who is doing the believing here? What purpose is the believing if it isn't unto salvation.
If you are going to say that it is for choosing and not salvation, you need to have a lot better support for that position.