"Von der Seele" is a philosophical treatise by the German psychiatrist and philosopher Karl Ludwig Schleich, which was published in 1908. In this book, the author examines the nature of the soul and its connection with the body, illuminates the issues of consciousness, dreams, emotions, and the relationship of a person with the world around him. Schleich examines mental states and phenomena through the prism of scientific data, but also turns to philosophical concepts to better understand the nature of the human soul. This book is one of the founders of psychology, which is still relevant for the study of various aspects of the human psyche.