Within shining walls, He lies on opulence. If only time was kind enough To let him lie forever.
In the end, He has to stand. In the end, Time beckons forgetfulness.
There’s a bit of a double entente in this poem. It came in naturally at first, but I probably forced it in at the end. The riches suggested by opulence are riches of the mind, otherwise known as knowledge. That’s why the last line is what it is.