This article presents the integrative soul mates relationship development model, which provides the helping professionals with a conceptual map for couples' relationship development from dating, to intimacy, to soul mating, and long-term flourishing. This model is informed by a holistic, a developmental, and a positive psychology conceptualization of the individual and the relationship. It integrates select concepts from narrative therapy, Gottman method, and Jungian analytic psychology. Two pictograms derived from 17th century alchemy are provided to facilitate the visual and metaphorical conceptualization of the model. The soul mates model applies to all individuals and couples interested in optimizing their relationship, regardless of marital status, religious affiliation, or sexual orientation. The model may be applied to counseling, therapy, and coaching interventions, as well as relationship education, research and measurement, courses in higher education, and couples' workshops and retreats. (Contains 2 tables and 2 figures.)