Natural Law Notes of Feyerabend is one of the most important sources by the research of ethical and juridical views of Kant. Dating back to 1784 they distinctly demonstrate that the basic principles of Kant’s philosophy of right are not a late production of the philosopher, but they have been formed already in the middle of 80’s of 18th century. Therewith we can use this lectures notes for the studies of Kant’s moral philosophy too, because of their closeness to the Foundations of Metaphysics of Morals, what can help us to understand some not clear aspects of Kant’s ethical thought. One of such questions is the question of moral motivation, and namely how we can not only know, what we have to do according to the moral law, but also actually...