"On the Soul" is a fundamental treatise of the great ancient Greek philosopher Aristotle. In this book, the author explores the nature of the soul, its relationship to the body, and the relationship with the mind. Aristotle considers the soul as the cause of life and movement, which makes this work one of the most important in the theory of psychology. He reveals the concept of the soul in the context of its functions and properties, trying to understand the nature of the human being. This book leaves the reader with deep thoughts about the essence of the soul and its role in the life of each person.