Spirituality, the study of how people live in response to God, is related to theology, which concerns what people think about God. Their complementary relationship is widely recognized in Pentecostal studies, for its cardinal doctrines often define intense experiences, as is the case with Spirit baptism. With the emergence over the last quarter century of spirituality as a primary category for Pentecostal research, the nature of the relationship is under review. Castelo (2020, 29–31) proposes that Pentecostal theology is a feature of Pente…