This study of Newman's religious development from his childhood to his conversion to Roman Catholicism explores Newman's growth in holiness and truth, i.e., religious truth, and the mutual influence of one upon the other. The former, the author states, is the more difficult to explore, since it involves not only a study of words and actions but of his inner life and motivation, which are often hidden. This exploration is undertaken here with the aid of materials not hitherto fully exploited: verses, sermons, prayers, and letters both by and to Newman.