When I compare all the transcendental Ideas, the totality of which constitutes the particular problem of natural pure reason, compelling it to quit the mere contemplation of nature, to transcend all possible experience, and in this endeavor to produce the thing (be it knowledge or fiction) called metaphysics, I think I perceive that the aim of this natural tendency is, to free our notions from the fetters of experience and from the limits of the mere contemplation of nature so far as at least to open to us a field containing mere objects for the pure understanding, which no sensibility can reach, not indeed for the purpose of speculatively occupying ourselves with them (for there we can find no ground to stand on), but because practical principles, which, without finding some such scope for their necessary expectation and hope, could not expand to the universality which reason unavoidably requires from a moral point of view.
Ideia transzendental guztiak biltzen ditudanean, zeintzuen multzoa baita arrazoi natural hutsaren problema berekia, honek behartzen baitu arrazoia naturaren gogoeta soila uztera, eta edozein esperientzia posibletatik harago joatera eta ahalegin horretan Metafisika deitzen den gauza hori (dela jakitea dela sofisma) taxutzera, orduan deskubritu uste dut, ezen prestasun natural honek bilatzen duena dela, gure kontzeptua esperientziaren kateetatik eta naturaren hautemapen soilaren mugapenetatik libratzea, eta libratu ere kontzeptu horrek bere aurrean eremu bat zabalik ikusteko moduan, zeinak eduki behar baititu adimen hutsarentzako objektuak bakarrik, sentsibilitateak inola ere eskuratu ezin ditzakeenak;