What Jesus reveals is not that laws disappear but that they must be kept through righteousness of a new kind, … which is more complete because it supplements the deficiency in the laws. … This expanded content we may call an inclination so to act as the laws may command, i. e., a unification of inclination with the law whereby the latter loses its form as law. This correspondence with inclination is the πληρωμα [fulfillment] of the law.

Der Geist des Christentums und sein Schicksal [The Spirit of Christianity and its Fate] (1799)