People have often asked me what the Zone is, and what it symbolizes, and have put forward wild conjectures on the subject. I'm reduced to a state of fury and despair by such questions. The Zone doesn't symbolize anything, any more than anything else does in my films: The zone is a zone, it's life, and as he makes his way across it a man may break down or he may come through. Whether he comes through or not depends on his own self-respect, and his capacity to distinguish between what matters and what is merely passing.

— Andrei Tarkovsky; on Stalker