The director tells people two quotes by Mary’s words in the movie. The first one is from Friedrich Nietzsche’s saying, “Blessed are the forgetful, for they get the better even of their blunders.” The second one is from Alexander Pope’s poem, “How happy is the blameless vestal's lot! The world forgetting, by the world forgot. Eternal sunshine of the spotless mind! Each prayer accepted, and each wish resigned.” The title of this movie, “Eternal Sunshine of the Spotless Mind” is from this quote.