This article describes how Kathryn Tanner understands the doctrine of the Trinity. Tanner, who is a professor of systematic theology at Yale Divinity School, is also a member of the Episcopal Church. In order to describe Tanner`s triune theology, we will explore the impact that Karl Barth, postliberalism and cultural theories have had on her methodologies. Through these lens of interpretation, she rereads the patristic and medieval resources of the Trinity. Contrary to social trinitarians who are in conversation with the tradition of Eastern Orthodoxy, Tanner depends on the tradition of the Western church, suggesting that trinitarian theology is understood in the Neo-platonistic frame(exitus -reditus), actively reading more commonalities between both than difference, especially giving prominence to soteriological motives in both traditions. In particular, she extends Augustinian pneumatology, vinculum caritatis (a bond of love) to the interpersonal analogies of the Trinity. She also connects this pneumatology to the concept of epektasis in Gregory of Nyssa. In doing so, for Tanner, the Father is source of good, the Son is the image of Father and the Holy Spirit is unity of love, reinforcing unity of the Father and the Son and unity of creation and God. We, exitus, through the Holy Spirit rest on the Son, are reditus. Finally the article will evaluate her triune theology and critique her emphasis on how indivisia ad extra seems to emphasize indivisiaadintra, distinguishing it from the economy of God.