I heard this on a commercial just recently. Normally, this would bring about a hatred in me for the producers so brazen as to defile greatness with capitalism, but I was too appreciative of the reminder. I loved this movie, though I must admit I didn't understand it near as well as I believe I should have. It remains a movie I will see again and again in the future as I am more prepared to see it.
Perhaps not quite central in the maker's eye, but certainly well nigh the core of this movie is the confrontation of romance and practicality. I guess the latter - a denizen of old and tired men worn from worry and hopes flown; and the other - faere ground of youth when dreams are still possible and even real.