A seminal text of modern philosophy, Immanuel KantsCritique of Pure Reason(1781) made history by bringing together two opposing schools of thought: rationalism, which grounds all our knowledge in reason, and empiricism, which traces all our knowledge to experience. Published here in a lucid reworking of Max Mllers classic translation, the Critique is a profound investigation into the nature of human reason, establishing its truth, falsities, illusions, and reality.