And though my understanding furnishes me a priori (yet only in reference to possible experience) with the concept of such a connexion (i.e., causation), I cannot exhibit it, like the concepts of mathematics, by (Anschauung) visualising them, a priori, and so show its possibility a priori. This concept, together with the principles of its application, always requires, if it shall hold a priori-as is requisite in metaphysics-a justification and deduction of its possibility, because we cannot otherwise know how far it holds good, and whether it can be used in experience only or beyond it also.
baizik eta ostera, kontzeptu horrek bere aplikazioko printzipioekin batera, beti behar du, a priori balio izateko-Metafisikan eskatzen den bezala-bere posibilitatearen justifikazio eta dedukzio bat, bestela ez baita jakiten zenbateraino balio duen horrek, edo esperientzian bakarrik erabiltzeko moduko ote den, ala hortik kanpora ere bai. Beraz, Metafisikan, hau arrazoi hutsaren zientzia espekulatibo bat denez, ez dago inoiz ere gizakiaren zentzu komunera jotzerik;