Sounds like something from Borges, but it's an interesting if idiosyncratic compilation.
Personal favorite - sonder.
(Searched Wordcraft for the phrase but found nothings.)
FWIW, sonder (German) is a cognate of sunder in English.
There is a German sense to sonder, meaning "special" (perhaps "apart?") in distinction to a French sense of "probe" (similar to the English "sound").
So perhaps both apply in the Obscure Sorrows sense of recognizing a different perspective
Loved it, Robert! I can't imagine one word meaning so much, as with opia.
By the way, welcome to our discussion board, AnWulf. I hope you will pull up a chair and stay awhile.