I read this story many years ago, could be twenty-five to thirty years.
The story is told in the first person, by a guy who is some kind of missionary.
In space he discovers that Heaven and Hell are individual places for everyone. That is, you will wind up on a planet, or in a situation, when you die, that is the best or worst you can imagine. I seem to remember he found Livingston on a planet that resembled a vast, African savannah.
The character even visited the place that had been prepared for him when he died.
I may have asked this question before, but don’t recall getting an answer. If I did I’m sorry. The story was intriquing and if I find it, and the author, I may look for other things they have written.