But the stimulus, like every cause and motive generally, never determines more than the point of time and space at which the manifestation of every force is to take place, and does not determine the inner nature of the force itself which is manifested. This inner nature we know, from our previous investigation, is will, to which therefore we ascribe both the unconscious and the conscious changes of the body.
Kitzikapenak, ordea, oro har edozein kausak eta motiboak berak bezala ez du determinatzen inoiz indar ororen denboran eta espazioan kanporatzearen sarrera-puntua baino gehiago, ez kanporatzen den indarraren barneko esentzia bera, zeina gure aurreko dedukzioaren arabera nahimen gisa ezagutzen baitugu, zeinari horregatik bai gorputzaren aldaketa kontzienteak bai inkontzienteak egozten batizkiogu.