ABSTRACT
Kant raises the question, what it is in us that recognizes or knows the law of nature, or what kind of knowledge it is. And he is concerned to show that it is not empirical knowledge, but necessary knowledge, and therefore apriori. These are terms taken from Kant’s theory of knowledge, a complicated and difficult subject. Now the moral law, if it is anything, is absolutely necessary and universal. Therefore it must be known, or recognized by the reason. Kant himself says that "the difficulty of determining the possibility of categorical imperative is a very profound one." But, at the same time, he holds that, if there is to be a moral law at all, it must be in the form of a categorical imperative. Anything which acts according to the moral law will be good in itself, and conversely anything good in itself must act according to that law.
