For it is extremely absurd to expect to be enlightened by reason, and yet to prescribe to her beforehand on which side she must incline.

Chapter II. The Canon of Pure Reason (2. Hauptstück. Der Canon der reinen Vernunft.)(A 795, B 823) | Chapter III. The Architectonic of Pure Reason (3. Hauptstück. Die Architectonik der reinen Vernunft.)(A 832, B 860)