"All our knowledge begins with the senses, proceeds to the understanding, and ends with reason. There is nothing higher than reason." Immanuel Kant argued that the moral law is a truth of reason, and hence that the same moral law binds all rational creatures. Thus in answer to the question, “What should I do?” Kant replies that we should act rationally according to a universal moral law. Immanuel Kant was a German philosopher and one of the central Enlightenment thinkers. If you believe in the power and weakness of the mind, then our May issue is worth your time and thoughts.