http://www.dictionaryofobscuresorrows.com/

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.

Interesting cognate.

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.