The Apologetic Value of Human Holiness begins by providing the first comprehensive account of the model of human holiness developed by the leading theologian Hans Urs von Balthasar. In so doing, the book also provides the first detailed explication of his Christocentric philosophical anthropology. Part 2 argues that von Balthasar anticipates some key developments in late twentieth-century Anglo-American analytical philosophy, and that certain of these developments - in particular, the ‘internal realism’ of Hilary Putnam - provide powerful support for von Balthasar’s theological philosophy. The final part elucidates von Balthasar’s core intuition that human holiness is of immense apologetic value for religious faith, and concludes with a new, ‘internalist’ theory of religious pluralism.