In Ideology and Insanity, Thomas Szasz expresses concern over classifying people with mental illness. Szasz noted how classifying a person has a direct influence over their self-image, and what they believe is possible. Decades later, research by Harvard psychologist Ellen Langer, captured in Mindfulness, shows the extent people unconsciously adapt their behaviour to their identity. We are what we think, and the concept becomes reality, a lens through which we see the world.
