Cognitive Behavioral Therapy (CBT) is an approach to therapy that focuses on learning to interrupt, rationalise and revaluate negative, spirals of cognition. The therapist teaches their client how to recognise when they are spiraling but more importantly, how to then interrupt the spiral, most commonly, by having to find evidence for thier negative thoughts. If there is no evidence that the negative thought is needed, it is a smart idea to let it go.