"Immanuel Kant was a virtual titan of philosophy, with an absolutely enormous influence upon subsequent philosophy and theology. This is no doubt due to his great insight and raw philosophical power; it is perhaps also due to the grave hermeneutical difficulties that attend study of his work. The British philosopher David Hume writes with a certain surface clarity that disappointingly disappears on closer inspection. With Kant, there is good news and bad news: the good news is that we don't suffer that disappointment; the bad news is that it's because there isn't any surface clarity to begin with."
Plantinga, Warranted Christian Belief, pg 9