The Ultimate Unknown
What happens after death is perhaps akin to speculating about black holes (or the current stock market), something now thought to be at the center of every galaxy. What they may contain is at present, unknowable, and a reminder that time, although infinite, is also finite, the reflection of mortality.
The reason it’s called a black hole is because no one knows how to articulate what the experience of being in one is like, since anyone or anything that goes through it never returns.
The concept of a singularity at its center suggests the symbolism of the microscopic macrocosm, a state where all the laws of time, space and gravity, don’t apply, at least as we define them from this side. A dilemma for science that would have to create new laws of physics to elucidate the inconceivable. Perhaps there is a connection here between the way science explains things and religion, identifying the singularity as “the divine spark” which sounds more like revelation influenced by biblical text, or visa versa.
Science Fiction is a way to speculate “scientifically” without the presence of enough supportable facts except to assert assumptions that what isn’t known can be manifested as anything since nothing can be definitively excluded from being imagined, usually using advanced technology that hasn’t been developed yet to embellish the possibilities. When invented, fiction then becomes fact.
Of course, all this is predicated on the assumption that “it” requires an explanation that language in the form of symbols is adequate enough to convey that whatever happens on the other side of the black hole is not nothing.