And you were dead in the trespasses and sins in which you once walked, following the course of this world, following the prince of the power of the air, the spirit that is now at work in the sons of disobedience—among whom we all once lived in the passions of our flesh, carrying out the desires of the body and the mind, and were by nature children of wrath, like the rest of mankind. But God, being rich in mercy, because of the great love with which he loved us, even when we were dead in our trespasses, made us alive together with Christ—by grace you have been saved—and raised us up with him and seated us with him in the heavenly places in Christ Jesus, so that in the coming ages he might show the immeasurable riches of his grace in kindness toward us in Christ Jesus. For by grace you have been saved through faith. And this is not your own doing; it is the gift of God, not a result of works, so that no one may boast. -Ephesians 2:1-9 (emphasis added)
The notion that we could choose or not choose to be saved implies that we are not really dead before salvation.
The concept of us being completely dead before salvation implies that God breathed life into us. And if He breathed life into us, could there have been any chance of us choosing not to be saved? If this were possible, who would have had the greater power – us or God?
So what should our response be? Utter gratefulness and humility. For there is no way we could have breathed life into ourselves. God did it all.
Note: I am not saying that all will be saved. I am saying that for those who are saved, God brought them to salvation, and He could not be resisted.