Ahh … good question. A question that is quite a bit above my theological pay grade to answer, and above most people’s pay grades to answer.
That doesn’t mean people haven’t tried. From time to time you hear about someone who died and went to heaven and had a tour of heaven and then they were sent back and now they are giving a report of what they saw. I’ve read a few of those reports over the years.
I am sorry, but they are pretty lame, unimaginative, and usually have an agenda of the author.
But, I can make a recommendation for a writer of amazing theological depth and creative artistry. Of course, it is C.S. Lewis.
The seven-volume Narnia series ends with The Last Battle. This book tells how Narnia comes to an end and what happens to all the creatures of Narnia. It is the final battle of good and evil. The last third of the book is the description of the world’s end and the new world beginning, and the creatures of Narnia entering into the outskirts of heaven and going “further up, further in.” It is so beautiful, it brings tears to my eyes …