Atom Egoyan on Persona :

“In some ways, it’s the quintessential art movie in that it is, on first viewing, quite mystifying and yet, at some level, deeply seductive. It is both simple and impenetrable. And it’s full of an unyielding sense of psychological complexity. It’s one of the most astonishing films about transference ever made. It’s probably the most self-referential work I can imagine.”