From the whole course of our critique we will have been sufficiently convinced that even though metaphysics cannot be the foundation of religion, yet it must always remain its bulwark, and that human reason, which is already dialectical on account of the tendency of its nature, could never dispense with such a science, which reins it in and, by means of a scientific and fully illuminating self knowledge/ prevents the devastations that a lawless speculative reason would otherwise in evitably perpetrate in both morality and religion. '