Since nothing in phenomena can be explained by the concept of freedom, but the mechanism of nature must constitute the only clue; moreover, when pure reason tries to ascend in the series of causes to the unconditioned, it falls into an antinomy which is entangled in incomprehensibilities on the one side as much as the other; whilst the latter (namely, mechanism) is at least useful in the explanation of phenomena, therefore no one would ever have been so rash as to introduce freedom into science, had not the moral law, and with it practical reason, come in and forced this notion upon us.
hori guztia honen bidez argitzen da, hots, askatasunaren adigaitik abiatuz agerpenetan ezer ezin denez argitu, baizik eta hor beti natur mekanismoa denez hari-gidaria, gainera arrazoimen hutsaren antinomiak, kausen ilaran baldintzatugaberaino igo nahi duenean, batean zein bestean ulertezintasunetan nahasten denez, besteak (mekanismoak) gutxienez agerpenak argitzeko erabilgarritasuna duen bitartean, bada, inoiz ez litzatekeela askatasuna jakintzan sartzeko ausardia izango ohituren legeak eta horrekin batera arrazoimen praktikoak hori egin ez balu eta adigai hori ezarri ez baligu.