Who hasn't experienced periods of feeling entangled in habitual unpleasant thoughts -- maybe worry, or anxiety, or fear, or self-criticism, or pressure to perform, etc.? Who hasn't had periods of feeling haunted or punished by persistent thoughts that limit them -- "I'm not smart enough," "I'm not comfortable talking to strangers," "I'm afraid of heights," "I always mess up under pressure." Everyone has their own collection of such thoughts. We've thought them so often for s...