How God relates to the world lies at the heart of the most intense debates in modern theology and philosophy. Movements of Nouvelle Théologie, process theology, radical orthodoxy, modern Trinitarian theology and postmodern theology (i.e. Jean-Luc Marion) all seek to reconsider God’s relation to the world as a corrective of what they perceive as problematic. Of particular significance is the recent revival of the theology of participation, as promoted by Radical Orthodoxy in UK and Hans Boersma in North America. Facing excessive secularism and fragmentation of the modern Western world, Radical Orthodoxy and Boersma resort to the pre-modern theology of participation as the way forward. Relying heavily on Platonism, however, their participatory theology, as critics pointed out, tends to compromise the intrinsic goodness of the creation. In this book, Ge proposes that a distinctively Christian theology of participation anchored in creatio ex nihilo, developed by Augustine and brought to the fore by Aquinas, provides a more promising solution which not only secures the unity of things in God but also the goodness of creaturely plurality.