Mr. Darkwood, once so interested in romantic love and whatever anyone had to say about it, was now thoroughly sick of the topic. Why did these lovers always repeat themselves? Didn’t they ever get tired of hearing themselves talk?

—EVE OTTENBERG, The Widow’s Opera

Like all addicts, signature killers work from a script, engaging in repetitive behavior to the point of obsessiveness.

—ROBERT D. KEPPEL and WILLIAM J. BIRNES, Signature Killers

We may say that the patient does not remember anything of what he has forgotten and repressed, but acts it out. He reproduces it not as a memory but as an action; he repeats it, without, of course, knowing that he is repeating it.

—SIGMUND FREUD, “Remembering, Repeating and Working-Through”

My fascination with letting images repeat and repeat—or in film’s case “run on”—manifests my belief that we spend much of our lives seeing without observing.

—ANDY WARHOL