Karen described going through some hard days, during which time a friend helped her develop resilience and self-belief. It was during this time of self-doubt that Karen read with interest the research on mistakes and brain growth. This changed her. In Karen’s words: And then all of a sudden, I had a whole different mindset. It was like, “Wait a minute. This is an opportunity. Not something that’s going to . . . where I’m gonna walk away and say, ‘This is it. I’m done.’”

