**An Apology for His Faith** is a well-known book by the English clergyman, writer and Cardinal John Henry Newman, which was published in 1864. In his autobiographical work, Newman talks about his spiritual development, searches and doubts that accompanied him on the way to accepting the Christian faith. In the Apology, he also defends his life, his beliefs and activities. The book "Apology of one's faith" is not only a confession of one's faith, but also a guide for those who are faced with belief and doubts in relation to religion. John Henry Newman in his work tried to answer the numerous arguments of opponents of Christianity, arguing his views and faith with wise logic and mostly his own experience. "Apology of one's faith" is not only a work that makes you think about your own beliefs, but also an important book that helps everyone restore faith and find answers to questions that may be faced by each person on the path of spiritual development.