This chapter introduces the topic of musical worship and ethics. It describes the rationale for the book and the research that inspired it, along with the scope of its claims. In highlighting the importance of ethical reflection on the activity of musical worship, particularly the intersections and ongoing synergies of ritual, community, subjectivities, aesthetics, dogma, and personal identities, the chapter situates the book as one in a line of interdisciplinary scholarship that provides a variety of perspectives on a given subject—in this case, the ethical significance of musical worship.