Sociologists define power as one party's capacity to influence another's action. Thus, power is a relational property of interpersonal interaction. However, its dynamics embed within institutions such as the church and the state. This paper explores power dynamics using a case study of the conflict between an Old Order Amish church and the civil law of Ohio. The church excommunicated a member for violating community rules. The member countered by suing the church in state court. We trace power within and across these spheres of influence, showing how each party defined the situation according to institutional vectors of power. While one might expect the state to possess greater power in this situation, we demonstrate that ultimately neither party had total power, and both lost to some extent. This case study identifies the importance of viewing power as interactional, dynamic, and contextual. [ABSTRACT FROM AUTHOR]