This work can't be the only piece with "pure spiritual quality" in the western art of painting. There are many pieces with this quality or better. Some by Vinci himself, some by others, such as Botticelli from the early Renaissance. And works by later artists too. "Immaculate conception" by Velasquez, for instance, a work completed when the artist was only 19 years of age though I somehow doubt the dating since it looks too good.
The interpretation I gave was given in the context of 禪 ("擬向即乖") and with a hint of Daoism demonstrated with the art of calligraphy of 王羲之. I don't quite understand why you think it is a 俗解. Perhaps my post was too brief.
"動與靜的邊界點" is good. This is also how I view drawings by Raphael. That again shows the Mona Lisa isn't the only piece.
