Rhetoric about bodies, health, and medicine is conceived at the intersection of multiple discursive systems and social domains. I contend that religion remains an underexplored (and sometimes misrepresented) realm in the rhetoric of health and medicine (RHM)—a gap this article seeks to address. Here, I present my research on the importance of Protestantism in the invention of the premature infant as a medical figure in the United States. I show that early discourse about premature birth is shot through with Protestant rhetoric and beliefs, and I propose the term “theo-moral physiology” for the religiously informed medical orientation popularized in late 19th century medical literature about premature babies. Ultimately, I challenge RHM scholars to resist the tendency to treat the rise of American biomedicine as a fundamentally secular project by attending to the ways modern medicine has evolved in tandem with contemporary religion.

To forge collaborative ties among the rhetoric of health and medicine, the medical humanities, and medicine itself, scholars need shared terms. We argue that techne can unite researchers from across these disciplines. To demonstrate, we discuss our interdisciplinary research study, Writing Diabetes. By learning about the techne of rhetoric and writing about diabetes, participants became more attentive to the techne of their health experience—or “health techne”—enabling them to invent new ways of “doing” diabetes.