Do you have a deep, dark secret?

Edgar Allan Poe’s 1843 short story “The Tell-Tale Heart” describes a man slowly going mad because of a dark secret. The narrator recounts a murder he has committed, of an old man with a filmy blue “vulture eye,” whose regard the murderer simply could not endure.

The narrator-killer hides the old man’s body under the floorboards of his house, but then he begins to hear the beating of the dead man’s heart beneath his feet. The sound—clearly a metaphor for the murderer’s tormenting shame and guilt—grows louder and louder. In the end, the narrator can stand the thumping no longer; seeking relief, he confesses his crime to the police.

Most, if not all, of us have guilty secrets, secrets we have never told anyone. Psychologists call the secrets we keep about ourselves “self-concealment.” Although what you self-conceal might feel uniquely shameful, the experience of carrying a guilty secret really doesn’t vary that much across the population. Michael Slepian, a professor of leadership and ethics at Columbia University, maintains a website called KeepingSecrets, which organizes into various categories the things that people are hiding from others. The most common secrets anonymously cataloged involve infidelity or indiscretion. In short: Your own tell-tale heart probably involves love and sex.