The doctrine of the highest good maintained by Immanuel Kant can be seen as the state in which an agent experiences happiness in proportion to their virtue. It is the supreme end of the will, meaning that beyond the attainment of a good will, which is moral excellence signified by abiding by the categorical imperative and pure practical reason, the attainment of happiness in proportion to your moral excellence is the supreme, unconditional motivation of the will. Furthermore, in virtue of the doctrine of the highest good, Kant postulates the existence of God and the eternal existence of rational agents, in order to reconcile three premises: (i) that agents are morally obligated to fully attain the highest good; (ii) that the object of an agent’s obligation must be possible; (iii) that an agent’s full realization of the highest good is not possible.