"Theology" is a foundational book that examines faith and doctrine in the context of religion. The author explores the concepts of God, faith, morality and spirituality through the lens of various religious traditions and philosophical approaches. The book invites the reader to discover and understand the basic concepts that shape faith and religious perception of the world. "Theology" opens the way to rapprochement with one's own soul and illuminates important aspects of the relationship between man and the cosmos. This book is not only a guide for believers, but also an invitation to think about the deep meaning of religion and one's own life.