“I prefer to express myself metaphorically. Let me stress: metaphorically, not symbolically. A symbol contains within itself a definite meaning, certain intellectual formula, while metaphor is an image. An image possessing the same distinguishing features as the world it represents. An image — as opposed to a symbol — is indefinite in meaning. One cannot speak of the infinite world by applying tools that are definite and finite. We can analyse the formula that constitutes a symbol, while metaphor is a being-within-itself, it’s a monomial. It falls apart at any attempt of touching it"

— Andrei Tarkovsky