I could quote more from this article by James Christen Steward, but I’ll limit myself to this:
In the way that great texts live in our libraries, available for revisiting and sustained scholarly investigation, the works of art in our museums offer the possibility of deep critical engagement, close looking, and technical analysis -- made all the deeper when brought together as collections in which dialogues arise through the conversation of objects with each other and with their scholarly interlocutors. Surely a key role of the academy -- the advancement of new knowledge and the challenging of past knowledge -- is that fruit of curatorial, faculty, and student research made possible by the sustained presence of great works of art, whose survival for the future is also thus (and not incidentally) guaranteed.