Sure! I’m not a native speaker either, so some suggestions may not be all that good.

The first one I noticed is in the first paragraph. I’m unsure if it’s a mistake or an obscure word, but when googling the word “pacrossct” I got no related results.

In the second paragraph both the word centuries and thousands of years are used. I’d suggest replacing thousands of years with millennia to keep it consistent. That may be a personal preference however.

The phrase:

But over time, the thought that everyone, sooner or later, would become just a pile of ashes enclosed in an urn in the ground, became a cause of anxiety and bitterness for him.

This is a long sentence with a lot going on. It’s a bit difficult to parse the meaning of it and I think it would be beneficial to split it up a bit. Something like the following perhaps:

But over time he came to ponder how everyone, sooner or later, would end up as just a pile of ashes enclosed in an urn in the ground. This became a cause of growing anxiety and bitterness for him.

I tried to stay true to your phrasing except where it would cause repetition due to my changes or I felt it would otherwise lack an emphasis that the original had.

I think these were mostly what I noticed, though some of the parentheses also seemed a bit out of place to me.

Again I just want to reiterate that I really liked your story and this is just minor details. I hope I do not come off as overly nitpicky or negative.

I think it was mainly those two word choices that I noticed, as I got