The Basis of Morality by Part 2 Chapter 6 Page 13

which the mental attitude of sympathy rests in the last resort will be the true basis of Ethics, and will form the subject of the third part of this Essay.

Thus, in his second formula, Kant distinguishes Egoism and its opposite by a very characteristic trait; and this point of merit I have all the more gladly brought out into strong light and illustrated, because in other respects there is little in the groundwork of his Ethics that I can admit.

The third and last form in which Kant put forward his Moral Principle is the Autonomy of the Will: “The Will of every rational being is universally legislative for all rational beings.” This of course follows from the first form.

As a consequence of the third, however, we are asked to believe (see p. 71; R., p. 60)