Stoic teachings encourage a particular way of thinking that people with mental health conditions such as anxiety, panic attacks, and depression have reported to find extremely effective at creating a deep sense of inner-calm and self-control, even in the face of intense hardships.
We all know we shouldn't worry about what people think of us, and yet we still do. Constantly. Until it literally make us ill. We let it influence how we feel about ourselves, we let it affect the decisions in our day-to-day life, we even allow it to dictate the types of dreams we pursue (or don't).