You should read Gaddis' "The Recognitions." It's a big novel, but an essential read for anyone interested in art. There is a passage where he talks about having that pure moment of recognition when you encounter a piece of art. Pg 91-92 in my Penguin edition.

He goes on to say, a person may only have 7 moments like this in their life (he's being a bit tongue and cheek I'd say, but still making a point)