El Criterio

A thoughtful guide to clear thinking, this work opens by asking what it truly means to “think well.” It argues that genuine knowledge is simply the faithful grasp of reality—whether that reality is the existence of God, the cycle of the seasons, or the simple virtues that bind societies. By contrasting honest observation with lofty speculation, the author shows how even a modest farmer can out‑speak a pretentious philosopher when he understands his subject.

The text then explores the many ways our perception can be distorted: seeing only part of a scene, adding details that aren’t there, or mistaking one thing for another. Through vivid analogies of mirrors and lenses, it illustrates how partial or illusory knowledge leads us astray, while a clear, exact mind reflects the world without alteration.

Finally, the author categorises the different intellects that approach truth—those who over‑interpret, those who see too narrowly, and the rare few who perceive the whole picture with precision. Their discourse is marked by simplicity, relevance, and an ability to illuminate even the most complex ideas without exhausting the listener.