RC Sproul, in his commentary on Romans, speaks on what he calls “judicial abandonment” from Romans 1:18-32. It is an explanation of just exactly how God justly judges people.
Three times in this section [of Romans 1:18-32] we read about human beings being given up by God. They are given up to their vile passions, the lust of the flesh, and their reprobate mind. When God judges people according to the standard of his righteousness, he is declaring that he will not strive with mankind forever. We hear all the time about God’s infinite mercy. I cringe when I hear it. God’s mercy is infinite insofar as it is mercy bestowed upon us by a Being who is infinite, but when the term infinite is used to describe his mercy rather than his person, I have problems with it because the Bible makes very clear that there is a limit to God’s mercy. There is a limit to his grace, and he is determined not to pour out his mercy on impenitent people forever. There is a time, as the Old Testament repeatedly reports, particularly in the book of the prophet Jeremiah, that God stops being gracious with people, and he gives them over to sin.
The worst thing that can happen to sinners is to be allowed to go on sinning without any divine restraints. At the end of the New Testament, in the book of Revelation when the description of the last judgment is set forth, God says, “He who is unjust, let him be unjust still; he who is filthy, let him be filthy still” (Rev 22:11). God gives people over to what they want. He abandons them to their sinful impulses and removes his restraints, saying in essence, “If you want to sin, go ahead and sin.” This is what theologians call “judicial abandonment”. God, in dispensing judgment, abandons the impenitent sinner forever.
Here in Romans… since by nature we repress the truth, God delivers us to our sin…
Romans is unapologetic about this concept of judicial abandonment, arguing that it is right and just for God to abandon sinners to the desires and lusts of their sin, thus allowing them to run, not walk, to hell. God’s grace is removed, and the flood gates are opened, so to speak. Without this divine restraint, as Sproul tells it, we as sinners will forever love our sin more than God, and choose hell without exception. And Paul tells us in Romans, it is right for God to do this. It is God’s righteous judgment on wicked.
Given this context, grace is a special gift of God, above and apart from what we actually deserve. When God saves sinners in Christ, he is bypassing what we actually deserve, and instead gives Christ the abandonment. He gives Christ the wrath. And he turns our hearts to him. This is the context of the gospel. And Paul wants us to make sure that although hell should be and would be something we all go to, God chooses to save some.
For more on this, you can read more on the nature of hell and condemnation here.