It only remains for us to take the final step, the extension of our way of looking at things to all those forces which act in nature in accordance with universal, unchangeable laws, in conformity with which the movements of all those bodies take place, which are wholly without organs, and have therefore no susceptibility for stimuli, and have no knowledge, which is the necessary condition of motives.
Orain azken urratsa egitea gelditzen zaigu, gure kontsideratze-era indar haietara guztietara hedatzea, zeinek naturan lege orokor, aldaezinen arabera eragiten baitute, zeinen arabera gorputz guztien higidurak gertatzen baitira, zeinek batere organorik ez izatean kitzikapenerako ez baitute sentikortasunik eta ez motiborako batere ezagutzarik ere.