Through close and sustained analysis of Augustine's exegesis of Scripture, Robinson argues that Augustine's Trinitarian exegesis offers significant-though not inexhaustible-support for Rahner's Trinitarian project and, particularly, his Grundaxiom . Firstly, he posits that Augustine provides weighty, biblically rich, support for Rahner's Trinitarian agenda at exactly those points where Rahner is explicitly critical of Augustine and the "Augustinian-Western tradition", overcoming various weaknesses detected in the later tradition, and pre-empting many of Rahner's later solutions. Secondly and consequently, Robinson suggests that Augustine offers a scriptural reading strategy that addresses the major exegetical difficulties perceived to emerge from Rahner's Rule. Thus, in Augustine's exegesis of Scripture, the Augustinian-Western tradition has always had the resources at its disposal to avoid or address the most poignant criticisms levelled both by and at Rahner.