My research explores the theological significance of mental disability for religious practice and community based on a year of ethnographic research at a Christian church, in which the majority of those who attend services and weekly day programs have diagnoses of serious mental illness and live in personal care homes. I argue that, rather than drawing attention to a set of central practices and tenets—a common liturgy—requiring able-bodied and able-minded participation, this community highlights the interdependent, improvisational performance arts by which people with differing abilities are continuously incorporated into religious practices and transform theological understandings. Bringing together the fields of liturgical studies, disability studies, embodiment, and aesthetics, I explore “art forms” of touch and gesture, silence and conversation, jokes and laughter, and naming that are essential to the shaping of a community of difference with and through psychiatric disability, rather than a mission to, or a program for, the mentally ill. I also explore how pervasive stigma and fear of people with mental illness, especially those who live in poverty, affects the ability of a community to shape a religious and ethical identity with and through illness and disability.