Critique of Pure Reason

Outline

Critique of Pure Reason (1781) asks what human reason can know and where its limits lie. Immanuel Kant argues that our knowledge does not simply mirror the world, because the mind actively shapes experience through space, time, and basic concepts such as cause and effect. The book transformed philosophy by showing why questions about God, the soul, and the universe as a whole lie beyond the reach of theoretical knowledge.

• The book asks what human reason can actually know and where the limits of that knowledge lie.
• Our knowledge does not simply mirror the world, because the mind actively shapes what we experience.
• Space, time, and basic concepts such as cause and effect are the tools the mind uses to shape experience.
• Questions about God, the soul, and the universe as a whole lie beyond the reach of theoretical knowledge.
• Published in 1781, the book transformed philosophy by redefining what knowledge and experience mean.

Immanuel Kant (1724–1804) was a German philosopher from Königsberg and one of the most influential thinkers of the modern era. His work reshaped the study of knowledge, ethics, and aesthetics. His major works include Critique of Pure Reason, Groundwork of the Metaphysics of Morals, Critique of Practical Reason, and Critique of Judgement.