The ear is profound, whereas the eye is frivolous, too easily satisfied. The ear is active, imaginative, whereas the eye is passive. When you hear a noise at night, instantly you imagine its cause. The sound of a train whistle conjures up the whole station. The eye can perceive only what is presented to it.
Robert BressonWhen a sound can replace an image, cut the image or neutralize it. The ear goes more towards the within, the eye towards the outer.
Robert Bresson