It has been recently argued that the doctrine of the Trinity in Gregory Nazianzen's thinking is the driving force of his personal and ecclesiastical life. However, no serious study has so far been done on the relation between Gregory Nazianzen's personal character as reflective of his theological mind and personal rationale. This article suggests that the proper road for reaching an accurate and perceptive understanding of Gregory Nazianzen's character starts from reading the literature of this father in a serious attempt at discovering the man behind the ideas of the texts and to perceive the core of his personality and character as theologian and servant of the church. Gregory's character and Gregory's theology, especially his trinitarian thinking, are windows which open towards each other. They reciprocally depict for us a sincere and puzzling servant of God as well as a unique and challenging theologian. The article starts by shedding analytical light on Gregory Nazianzen's core trinitarian logic, which lies in his understanding of the idea of ‘reciprocity’ and his envisioning of triadic perichoretic trinitarian monarchy, instead of a hierarchical one, in the Godhead. It then explores the presence of this rationale in Gregory's own understanding of his personal and ministerial character as the ‘dwelling place’ of God's triune image. The article concludes with the suggestion that Gregory's writings clearly state his belief that theology is the theologian, and the theologian is someone whose life and personhood mirror her theological mind. For this church father, there is no claimed neutral separation between the theologian and his or her theology.