An Essay Concerning Human Understanding . Thus the observation of human blindness and weakness is the result of all philosophy, and meets us at every turn, in spite of our endeavors to elude or avoid it. By this means, we may make a kind of merit of our very ignorance. An Enquiry Concerning Human Understanding . It is, indeed, the common fate of human reason in speculation, to finish the imposing edifice of thought as rapidly as possible, and then for the first time to begin to examine whether the foundation is a solid one or no.
All ignorance is either ignorance of things, or of the limits of knowledge.
Critique of Pure Reason . Perhaps this is why religions so often turn to poetry and cryptic writing.