A film is made of so many disparate elements; it possesses such resources, such a wealth of combination and composition, that it can lead to an infernal mess. Happily, at some point you come up against what can be called an internal necessity.
“A small subject can provide the pretext for many profound combinations. Avoid subjects that are too vast or too remote, in which nothing warns you when you are going astray, or else take from them only what can be mingled with your life and belongs to your experience.”
Robert Bresson