"...what am I to make of "Kapoor uses materials which reflect or absorb light, or allow light to pass through them" which covers the whole spectrum of materials in the universe, without exception.... "

Yes, I'll give you that one, BUT if the artist is making a conscious decision to distiguish between these qualities in his work then it still has some validity as a statement of intent.

"and try as I might I can't pretend that "engaged with polarity and a search for the evocation of the sublime: presence and absence, being and non-being, place and non-place, the solid and the intangible" don't sound like utter bollocks to me, because it does."

Seems to be about nothing more than stretching ideas of polarity to me (Yin and Yang if you like). Fascinating to me as a Pagan.