The book "Methodology of the appropriate management of the mind and the search for truth in the sciences" by the outstanding French philosopher René Descartes is one of the most famous works in world philosophy. Published in 1637, this work is a key text of Cariantian rationalism, which ushered in a new era in philosophy. In his "Methodique" Descartes lays out the principles of rational thinking and the search for truth, and also establishes a rigorous research method based on doubt and self-criticism. The author suggests readers to abandon everything that can be questioned and look for the first unequivocally correct statement that could become a beacon in the search for truth. "Methodology of the appropriate control of the mind and the search for truth in the sciences" is not only a philosophical treatise, but also an important classic text that influenced the further development of science, philosophy and culture in general.