Here are some extracts from Tim Keller's article "The Importance of Hell."
Unless we come to grips with this "terrible" doctrine, we will never even begin to understand the depths of what Jesus did for us on the cross.
His body was being destroyed in the worst possible way, but that was a flea bite compared to what was happening to his soul. When he cried out that his God had forsaken him he was experiencing hell itself.
But consider--if our debt for sin is so great that it is never paid off there, but our hell stretches on for eternity, then what are we to conclude from the fact that Jesus said the payment was "finished" (John 19:30) after only three hours? We learn that what he felt on the cross was far worse and deeper than all of our deserved hells put together.
And this makes emotional sense when we consider the relationship he lost. If a mild acquaintance denounces you and rejects you--that hurts. If a good friend does the same--that hurts far worse. However, if your spouse walks out on you saying, "I never want to see you again," that is far more devastating still.
The longer, deeper, and more intimate the relationship, the more tortuous is any separation. But the Son's relationship with the Father was beginningless and infinitely greater than the most intimate and passionate human relationship.
When Jesus was cut off from God he went into the deepest pit and most powerful furnace, beyond all imagining. He experienced the full wrath of the Father. And he did it voluntarily, for us.
Fairly often I meet people who say, "I have a personal relationship with a loving God, and yet I don't believe in Jesus Christ at all." Why, I ask? "My God is too loving to pour out infinite suffering on anyone for sin." But this shows a deep misunderstanding of both God and the cross. On the cross, God HIMSELF, incarnated as Jesus, took the punishment. He didn't visit it on a third party, however willing.
So the question becomes: what did it cost your kind of god to love us and embrace us? What did he endure in order to receive us? Where did this god agonize, cry out, and where were his nails and thorns? The only answer is: "I don't think that was necessary."
But then ironically, in our effort to make God more loving, we have made him less loving. His love, in the end, needed to take no action. It was sentimentality, not love at all.
The worship of a god like this will be at most impersonal, cognitive, and ethical. There will be no joyful self-abandonment, no humble boldness, no constant sense of wonder. We could not sing to him "love so amazing, so divine, demands my soul, my life, my all."
Only through the cross could our separation from God be removed, and we will spend all eternity loving and praising God for what he has done (Rev 5:9-14.)
And if Jesus did not experience hell itself for us, then we ourselves are devalued. In Isaiah, we are told, "The results of his suffering he shall see, and shall be satisfied" (Isaiah 53:11). This is a stupendous thought. Jesus suffered infinitely more than any human soul in eternal hell, yet he looks at us and says, "It was worth it." What could make us feel more loved and valued than that?
The Savior presented in the gospel waded through hell itself rather than lose us, and no other savior ever depicted has loved us at such a cost.
You can read the whole thing here.