It appears that, in single instances of the operation of bodies, we never can, by our utmost scrutiny, discover any thing but one event following another, without being able to comprehend any force or power by which the cause operates, or any connexion between it and its supposed effect.
eta ez garela kapaz kausari eragimena damaion indar edo ahalik, edo bera eta bere efektua delakoaren arteko konexiorik, ulertzeko. Zailtasun bera azaltzen da gogoaren gorputzari buruzko eragiketei behatzean: