A couple of thoughts I want to add here.
In his epistle to the saints at Ephesus, Paul writes of the spiritual blessings the saints have in Christ saying, "He chose us in Him before the foundation of the world" (Eph. 1:4). As you read through Ephesians Chapter 1, have a look at the references to the various aspects of salvation and how they are e.g.; v:5 "...according to the purpose of his will"; v:9, "...according to his purpose, which he set forth in Christ"; v:11, "...according to the purpose of him who works all things according to the counsel of his will." And we are told in that Chapter the Holy Spirit is the "guarantee" (v:14); the earnest deposit, the down payment, who Himself ensures the completion of the salvific work.
When writing to the saints at Rome, Paul dealt with the objections some would have concerning God acting according to His sovereign will in regard to the salvation of sinners. In Rom. 9:14-21 Paul wrote,
What shall we say then? Is there unrighteousness with God? Certainly not! For He says to Moses, “I will have mercy on whomever I will have mercy, and I will have compassion on whomever I will have compassion.” So then it is not of him who wills, nor of him who runs, but of God who shows mercy. For the Scripture says to the Pharaoh, “For this very purpose I have raised you up, that I may show My power in you, and that My name may be declared in all the earth.” Therefore He has mercy on whom He wills, and whom He wills He hardens. You will say to me then, “Why does He still find fault? For who has resisted His will?” But indeed, O man, who are you to reply against God? Will the thing formed say to him who formed it, “Why have you made me like this?” Does not the potter have power over the clay, from the same lump to make one vessel for honor and another for dishonor?
Jesus told the disciples, "No one can come to me unless the Father who sent me draws him. And I will raise him up on the last day" (John 6:44). And in v:65; And he said, “This is why I told you that no one can come to me unless it is granted him by the Father.”
Our thinking needs to start with who God is; God is God, He is the Potter and He has all power and authority to do as He wills with the clay, We are subject to His will, not He to ours.