One bad night can become a lifelong rule.
Picture running for a role, giving the speech, and losing badly. Afterward, no one quite meets your eye. A conclusion forms: “I am not good at this.” It feels like a fact, and you start living by it. You avoid the stage, turn down chances to present, and hide your nerves when you cannot avoid it.
Years later, it can turn out that the very thing you ruled yourself out of is one of your real strengths. The agreement was never true. It only felt true because you never tested it.