"Critique of Pure Reason" by Immanuel Kant is a fundamental philosophical work in which the author analyzes the possibilities of knowledge. The book examines the nature of the mind, its ability to synthesize experience and a priori forms of knowledge. Kant considers the concepts of space, time, causality and other categories that affect our perception of the world. This work became an important contribution to philosophy and influenced the further development of scientific research. "Criticism of pure reason" is not only a philosophical interpretation of knowledge, but also a challenge to independent thinking and analysis of fundamental questions of life.