Every sinner is already condemned. The only way that verdict can be reversed and the slate cleaned and the sinner forgiven is by believing in the unique Son of God, the only way.
So it’s important to remember this: what damns people to hell in the end is not because of some divine decree made by God…What damns people to hell is not because of some deficient provision in the sacrifice of Christ. What damns people to hell is not because they sin and because they break God’s Law. What damns people to hell is because they do not believe in Jesus Christ.
That’s the issue.
So when you talk to people, I think it’s sometimes okay to say, “You know, you’re a lawbreaker, you’ve broken this law, broken that law, broken the Ten Commandments, fine. That’s all forgivable.”
Sooner or later in the conversation, and may I suggest sooner rather than later, you need to address people about what they think concerning Jesus Christ and cut to the chase and say, “If you do not believe in the Lord Jesus Christ as Redeemer, and Savior, and Lord, you will die in your sins and go to hell. That is the one unforgivable sin.”