Kritik der reinen Vernunft Zweite hin und wieder verbesserte Auflage (1787)

This work opens a careful inquiry into what the human mind can know without relying on experience. It begins by drawing a clear line between knowledge that comes from the senses and that which is rooted in the structures of reason itself. The author asks how we are able to possess concepts that are valid before any particular observation, setting the stage for a systematic examination of the foundations of thought.

From there, the discussion moves to the way we intuit space and time, treating them as the necessary conditions for any perception. It then introduces the categories—pure concepts that shape our judgments—and shows how they enable synthetic statements that are nevertheless a priori. By laying out this architecture, the book seeks to secure the possibility of science while warning against the illusion of unfounded metaphysical claims. Listeners will be guided through a rigorous yet accessible exploration of the limits and powers of pure reason.