In this important book, Chung-Hyun Baik explores one of the central issues in contemporary Trinitarian theology: the relationship between the economic and immanent Trinity. Engaging a wide variety of Trinitarian theologians and contemporary philosophers, Baik offers a vital analysis of the ontological and epistemological issues that bear on a proper understanding of the doctrine of the Trinity. Noting that the meaning of mystery in the New Testament is Jesus Christ himself, Baik argues that, in order to rightly approach the question of the relationship between the immanent and the economic Trinity, it is necessary to understand the mystery of the divine being as centered in Christ himself. Moreover, Christ is not merely a device for resolving epistemological or ontological tensions, but rather the fullness of the divine mystery, and as such, must be determinative of all such theological and philosophical questions.