Aristotle Papanikolaou shows how an ontology of divine-human communion is at the center of both Lossky's and Zizioulas's theological projects. He also shows how, for both theologians, this core belief is used as a self-identifying marker against "Western" theologies. Papanikolaou maintains, however, that Lossky and Zizioulas hold profoundly different views on how to conceptualize God as the Trinity. Their key difference is over the use of apophaticism in theology in general and especially the relation of apophaticism to the doctrine of the Trinity. For Lossky, apophaticism is the central precondition for a trinitarian theology; for Zizioulas, apophaticism has a much more restricted role in theological discourse, and the God experienced in the eucharist is not the God beyond being but the immanent life of the trinitarian God. Papanikolaou provides readers with a richer understanding of contemporary Orthodox theology through his analysis of the consensus and debate between two leading Orthodox theologians.