In the Groundwork Kant refers to the analogy between the moral law and the law of nature when clarifying the concept of the categorical imperative. However, in the Groundwork itself, he does not give any further explanation as to why he introduces the analogy. Therefore, I take the Groundwork as a starting point of my article, but then I explicate on the analogy from a broader perspective, focusing especially on his lecture courses Moral Mrongovius II and Naturrecht Feyerabend as well (...) as on his Typic chapter of the second Critique. (shrink)