Dr Marsha Linehan, who founded DBT and is one of the most celebrated psychologists in the world today, spent two years in a psychiatric hospital when she was 17. Marsha eventually found a way out of her own personal hell and resolved to ‘help people find the path to getting out of hell’ themselves. In this column, I explore Marsha's invalidating relationship with her mother, her intense self-loathing, and her advice for people who hate themselves and who try to be someone they're not.