A strength of the cognitive approach to treating depression is its real-life application, particularly in the NHS. Cognitive behavioural therapy (CBT) is widely used as a first-line treatment for depression, as recommended by NICE guidelines. Its structured, time-limited nature makes it cost-effective and suitable for the NHS, where resources are limited. Since CBT focuses on challenging irrational beliefs and promoting behavioural activation, it empowers patients to take control of their thoughts and behaviours, improving their quality of life. This practical application increases the external validity of the cognitive approach and demonstrates its benefit to society by providing accessible, evidence-based care.