In deliberate contrast to the approach taken by Jean Epstein and his peers, which was to never leave anything in their work to chance, with every aesthetic decision having a rational explanation and fitting clearly into the whole, Buñuel made clear throughout his writings that, between Dalí and himself, the only rule for the writing of the script was: "No idea or image that might lend itself to a rational explanation of any kind would be accepted." He also stated: "Nothing, in the film, symbolizes anything. The only method of investigation of the symbols would be, perhaps, psychoanalysis."