The book "Reflections on the method for the good guidance of the mind and the discovery of truth in the sciences" by the famous French philosopher René Descartes is considered one of the most important philosophical works in history. In this book, Descartes examines the method of achieving truth, laying the foundation for the separation of doubt and knowledge. He proposed to cancel the views of his predecessors, who were condemned to error, and to start the process of building a new system of knowledge, recognizing the truth only with the help of reason. This book is recognized as the foundation of modern philosophy and methodology of science, and it remains relevant and extremely important for the development of the humanities.