"The Criterion" is a philosophical work by the outstanding Spanish writer and philosopher Jaime Luciano Balmes, which helps readers understand the essence of critical thinking and learn to distinguish right from wrong. In his book, the author raises questions about the nature of truth, reason and morality, and also draws attention to the importance of a responsible approach to decision-making. "The Criterion" has become a classic work of philosophy, which inspires readers to immerse themselves in the world of reflection and analysis, helping to form a personal position in public discussions and moral issues.