Blain,No not everyone will believe but for those who do will be saved. the word believe is a word that means choosing to have faith in something and that something is Christ himself, The jews rejected him so he went to the gentiles but the key point is that anyone who calls on the name of Jesus Christ will be saved this is what the scriptures say and there are many verses that use the words allmeveryone,many ect. not some nor few nor selected groups either
So no not all will choose to believe but that doesn't mean that salvation is not fo all of mankind
I think that you are stuck somewhere in the middle of being a FWer and being reformed. I'm not criticizing you, simply stating a fact.
If the only way to God is through Christ, then we were either placed there or somehow achieved it by ourselves.
One of the first things that scripture teaches is our inability to please God in any way. That is why we are in need of a Savior.
If we cannot please Him, how can we, [without His grace], ever choose to trust and believe?