The book "A positive result of philosophy. The nature of the work of the human brain. Letters from logic" is an important work in the field of philosophy and psychology. In it, the author Dietzgen, Joseph, examines the nature of human thinking, the workings of the brain, and the foundations of logic. It analyzes how we perceive the world, how our understanding affects our behavior and decisions. Letters on logic, which are included in the book, reveal the basic principles of logical thinking and its impact on our lives. This book will help readers better understand the essence of human thinking and its importance in today's world.