We speak with MIT’s Seth Mnookin, a writer and ex-addict who has been clean for 20 years, about the connection between substance abuse and underlying mental health issues, and how addiction can affect creativity and career. And we explore the hard lessons addicts can learn in recovery about their own limitations and definitions of success with CHA Center for Mindfulness and Compassion's Dr. Zev Schuman-Olivier, an addiction psychiatrist who focuses on mindfulness as a path to healing.