This is a critique of main trends in contemporary theology through a re-reading of Augustine's De Trinitate. 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 Turner, John Milbank, Catherine Pickstock and Graham Ward. "T&T Clark Studies in Systematic Theology" is a series of monographs in the field of Christian doctrine, with a particular focus on constructive engagement with major topics through historical analysis or contemporary restatement.