Not actually a movie but a line so pretty it had to be posted:
Acetylcholine neurons fire high, voltage impulses into the forebrain. The impulses become pictures, the pictures become your dream. But no one knows why we choose these particular pictures.
Suddenly it was twenty-five years later. I was old, sitting in a red room. There was a midget in a red suit and a beautiful young woman who looked exactly like Laura Palmer. The little man told me my favorite gum was coming back in style and didn't his cousin look exactly like Laura Palmer?