The St. John's College magazine, the current one with J.S. Bach on the cover, (warning:pdf) has a quote from Ayn Rand featured on page 23, but it's attributed to Marcel Proust. Someone else pointed it out to me a while back.
It's her definition of art. Try googling: proust "metaphysical value judgments"
You will get a lot of hits. Proust has become Objectivist in his theory of art, in retrospect.
I suspect someone credited Proust
To give the quotation a boost.