Definition
Self-consistency is the principle that, over time, behavior tends to align with the picture a person holds of themselves. The idea was formalized by psychologist Prescott Lecky in the 1940s and adopted by Maltz as the engine of his framework. Behavior that contradicts the self-image is unstable; behavior that confirms it is reinforced. The system trends toward agreement between picture and conduct.
The principle explains both the durability of identity-aligned behavior and the apparent invulnerability of self-defeating patterns. A person who believes "I'm not a finisher" will find creative ways to abandon projects even when they intend to complete them — not because they want to fail, but because the system prefers a consistent narrative to an inconsistent outcome.
Why it matters
How it works
The nervous system uses self-image as a reference point and treats deviation from it as error. The error generates pressure to return to consistency — usually by adjusting behavior to fit the picture, sometimes by re-interpreting events to preserve the picture. Either way, the picture wins over time.
The leverage point is therefore the picture itself. Update the self-image, even slightly, and the same consistency that previously enforced the old behavior now enforces the new one. The exact same mechanism that traps people in old patterns becomes the mechanism that holds new patterns in place once they exist.