Maarten Wisse develops a critique of dominant trends in contemporary theology through a re-reading of Augustine's De Trinitate. Theological topics covered include the thinking about the relationship of between God and World as participation of the finite in the infinite, Christology as a manifestation of this ontology of participation, Trinity as a model for our relational mode of being and deification (theosis) as the purpose of salvation. Key figures are brought in conversation with an Augustinian alternative to these trends, such as Wolfhart Pannenberg, Joseph Ratzinger, Denys Turbaner, John Milbank, Catherine Pickstock and Graham Ward.