"Kant is the first philosopher of self-sacrifice to advance this ethics as a matter of philosophic principle, explicit, self-conscious, uncompromised—essentially uncontradicted by any remnants of the Greek, pro-self viewpoint.

"Thus, although he believed that the dutiful man would be rewarded with happiness after death (and that this is proper), Kant holds that the man who is motivated by such a consideration is nonmoral (since he is still acting from inclination, albeit a supernaturally oriented one). Nor will Kant permit the dutiful man to be motivated even by the desire to feel a sense of moral self-approval.

"The main line of pre-Kantian moralists had urged man to perform certain actions in order to reach a goal of some kind. They had urged man to love the object which is the good (however it was conceived) and strive to gain it, even if most transferred the quest to the next life. They had asked man to practice a code of virtues as a means to the attainment of values. Kant dissociates virtue from the pursuit of any goal. He dissociates it from man’s love of or even interest in any object. Which means: he dissociates morality from values, any values, values as such."

-Leonard Peikoff, The Ominous Parallels, p. 78