As music teachers, part of the job description involves the detection of student errors and the use of our experience and education to eliminate them. This article is an exploration of the role of error in the learning process, with the goal of recognizing mistakes not as an enemy to be vanquished but as a friend with much to teach us. Carol Dweck's seminal research into the importance of "growth mindset," in which students react to challenges with excitement rather than fear, lies at the heart of this journey. In addition, the importance of reflective, deliberate practice is highlighted as a key feature in developing musicality, as well as the idea of creating "desirable difficulty." Teachers are encouraged to help students analyze their performances and develop strategies for overcoming difficulties. By designing our general music classrooms as places where student struggle is not just accepted but celebrated for its connection to true musical growth, we can help every student discover their potential.