Recent years have seen an explosion of interest in the study of emotion and cognition, and an increasing rejection of the traditional philosophical prejudice against emotions as irrational or disruptive. The essays in this collection explore various facets of the relationships among emotion, action, rationality, and self-knowledge, with particular attention to three main sets of issues: the relationships between emotions and action, the roles emotion and action play in the development of self-awareness, and the rationality of emotions and emotional action.