What does it mean that identity drives behavior more than goals do?

People act consistently with who they believe they are.

Example: A researcher hands out "I Voted" stickers on election day and notices something strange. The people who took stickers did not take them because they had voted — many grabbed them on the way in, before entering the booth. The sticker was not a record of behavior. It was a declaration of identity. And once the sticker was on their jacket, the behavior became almost inevitable, because refusing to vote while wearing the sticker would have created an unbearable contradiction between who they were publicly claiming to be and what they were actually doing. The identity claim preceded the behavior and then compelled it — not the civic goal of "participating in democracy," not the outcome of "electing my preferred candidate," but the simple, visceral need to act consistently with the label they had just placed on themselves.

Try this: Identify a behavior you have been trying to change through goal-setting — exercising more, writing regularly, eating differently, learning a skill. Write down the goal as you have been framing it. Now rewrite it as an identity statement: not "I want to run three times a week" but "I am a runner." Not "I want to read more" but "I am a reader." For the next seven days, begin each morning by reading the identity statement aloud. Before each decision point related to the behavior, ask yourself: "What would a person with this identity do right now?" At the end of the week, compare your consistency against the previous month of goal-based effort. Note which framing produced more action on difficult days.