The Citadel of Faith is an important work written by the Shoghi author, Effendi, who is a key figure in the history of Bahá'íism. In his book, he reveals deep philosophical topics and offers reflections on the essence of faith and spirituality. The author addresses the reader with an invitation to consider the world through the prism of faith, encouraging discussion and understanding of one's own spiritual searches. This book deserves the attention of everyone who is interested in the inner world of man and religious philosophy.