 So too, it is a contradiction for me to make another’s perfection my end and consider myself under an obligation to promote this. For the perfection of another human being, as a person, consists just in this: that he himself is able to set his end in accordance with his own conception of duty; and it is self-contradictory to require that I do (make it my duty to do) something that only the other himself can do. (6: 386)