Kant's Groundwork of the Metaphysics of Morals

Kant's analysis of ordinary moral consciousness reveals that people believe they are bound by duty. Duty, in turn, Kant explains, "is the necessity of an action from respect for law." All inclination to the contrary, and even inclination toward duty is set aside, so that the only motivation is respect for law. The binding power of the law reflects not only a universal command but also a universal command of reason. After all, given that the realm of experience is, by nature, contingent, no empirical fact can command as completely. Reason's command is an imperative: it is what must be done. When one does one's duty for its own sake, then one acts from respect for the moral law