Those who study, teach, and write about orthodoxy typically omit almost entirely any explicit consideration of human emotions. It is not surprising, then, that theology can seem an abstract activity without much effectiveness either for inspiring ritual and moral practice or for fostering attachment to Christianity. Similarly, church leaders, in their concentration on orthodoxy or orthopraxy, pay insufficient attention to the affective alienation occurring within and among Christians. This article brings to bear on theology the burgeoning philosophical and psychological research on emotions. It develops the cognitive and participative nature of emotions; their role in forming both an existential faith and community; the legitimacy and independence but also the inadequacy of conceptualist theology; the conflicts, tensions, and mutual contributions of intellect and emotion; and, finally, the role of emotion in moving ideas to practice.