Do you believe in predestination ?
This is the million dollar question. Most in mans religions dont believe in this doctrine, or they believe it in a man centered way that deny the Sovereignty of God, but nevertheless its a Salvation Doctrine. In a book and chapter primarily about Salvation Paul writes Eph 1:3-6
3 Blessed be the God and Father of our Lord Jesus Christ, who hath blessed us with all spiritual blessings in heavenly places in Christ:
4 According as he hath chosen us in him before the foundation of the world, that we should be holy and without blame before him in love:
5 Having predestinated us unto the adoption of children by Jesus Christ to himself, according to the good pleasure of his will,
6 To the praise of the glory of his grace, wherein he hath made us accepted in the beloved.
Rom 8:28-30
28 And we know that all things work together for good to them that love God, to them who are the called according to his purpose.
29 For whom he did foreknow, he also did predestinate to be conformed to the image of his Son, that he might be the firstborn among many brethren.
30 Moreover whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified.
There's no word of Salvation without predestination.