The young man in my office was impeccably dressed and articulate. He was an Ivy League MBA, successful in the financial world, and had lived in three countries before age 30. Raised in a family with only the loosest connections to a mainline church, he had little understanding of Christianity.

I was therefore gratified to learn of his intense spiritual interest, recently piqued as he attended our church. He said he was ready to embrace the gospel. But there was a final obstacle.

"You've said that if we do not believe in Christ," he said, "we are lost and condemned. I'm sorry, I just cannot buy that. I work with some fine people who are Muslim, Jewish, or agnostic. I cannot believe they are going to hell just because they don't believe in Jesus. In fact, I cannot reconcile the very idea of hell with a loving God—even if he is holy too."

This young man expressed what may be the main objection contemporary secular people make to the Christian message. (A ...