One has to be spiritually dead to reject something as good as the gospel of Jesus Christ. As you know, "gospel" means "good news". It is the good news of God saving sinners. It proclaims that, though we are sinners who deserve eternal damnation, God has delivered us from it through the sacrifice of His only begotten Son. This has got to be the best news that can ever strike our ears and touch our hearts when we think about what we are saved from. Think about the worst pain you have ever felt, physically or emotionally. Multiply that by 100 or 1,000 times. And stretch that out for all eternity. It boggles our mind, doesn't it? It's beyond the farthest stretch of our imagination. Our mind refuses to go there for its horror. Hell is not something to joke about. Hell is not something to take lightly. One of the frustrations I have as a preacher of God's Word is that I take hell way too lightly. I mention it too casually. Even when I speak of it with the deepest pathos I can muster, I know that I don't do justice to the weightiness of it. I know it's bad, really bad, but I don't know how bad it really is.
Even though we will never know in this life how bad Hell is, we can be sure that it will be far worse than our greatest nightmare. And if we can remember what we are saved from, what would be our response to even the greatest miseries in this life? We would laugh at them. Sure, we will still feel the sting. How can we not? Even then, we will not lose a sense of gratitude if we can use it to remind ourselves of how we have been saved from a far greater misery. Someone who survived a deadly bout with cancer will laugh at the colds he catches--he may even be thankful that all he has are just colds! No more bad days for those who are in Christ!