This capstone examines how adversity and challenge are favorable conditions for developing friendship. In Part I, I provide an overview of positive psychology, and how my capstone topic fits into the science of well being. In Part II I gather the research and literature on friendship from positive psychology, philosophy and evolutionary psychology and bring forward their wisdom on how adversity fosters connection. In Part III, I define adversity, distinguish it from trauma and discuss how friends could seek an appropriate amount of challenge in their shared experiences. Finally in Part IV, I build on several psychological theories to introduce the theoretical foundations for my own construct: Virtue Resonance. I outline the psychological theories and research to visualize how virtue can resonate and grow between friends.