CS Lewis.. a guide to his Theology

David Clark's comprehensive study examines C.S. Lewis's theological framework, tracing the development and coherence of his religious thought across his diverse corpus of apologetic, literary, and devotional writings. The monograph situates Lewis within the broader tradition of Christian analytic philosophy while demonstrating how his particular synthesis of reason, imagination, and faith contributed to twentieth-century theological discourse.

Clark argues that Lewis's theology, though never systematically presented in a single work, forms a coherent intellectual structure grounded in what contemporary philosophers of religion term the cumulative case argument. This approach, which Lewis employed intuitively rather than technically, builds a case for Christian theism through converging lines of evidence rather than relying on any single decisive proof. The study demonstrates how Lewis marshaled arguments from morality, reason, desire, beauty, and human experience to construct a multi-faceted defense of Christian belief that avoided both rigid rationalism and anti-intellectual fideism.

The work carefully reconstructs Lewis's intellectual formation, showing how his journey from atheism to Christianity shaped his apologetic method. Clark traces influences from medieval philosophy, particularly the natural theology tradition, alongside Lewis's engagement with contemporary philosophical movements including logical positivism and existentialism. This intellectual-historical approach reveals how Lewis developed distinctive responses to modern challenges to religious belief while remaining rooted in classical Christian orthodoxy.

Particularly valuable is Clark's analysis of how Lewis's theological vision integrated philosophical argument with imaginative appeal. The study examines Lewis's conviction that reason and imagination work together in apprehending religious truth, a position that distinguished him from both purely rationalistic apologists and those who divorced faith from intellectual inquiry. Clark demonstrates how this integrative approach manifested across Lewis's varied writings, from the philosophical arguments of Mere Christianity to the mythopoeic theology of his fiction.

The monograph contributes significantly to understanding Lewis's enduring influence on the God debate by clarifying how his cumulative case methodology anticipated later developments in philosophy of religion. Clark shows that Lewis's approach offered a middle path between evidentialist and presuppositionalist apologetics, providing resources for engaging contemporary secular thought while maintaining robust theological commitments. This analysis illuminates why Lewis's writings continue to shape discussions about religious belief, particularly in addressing the relationship between faith and reason in pluralistic contexts.