-The nature or essence of the emotions cannot be explained solely through our essence or nature (III. Deff. i., ii.), but it must be defined by the power, that is (III.
Afektuen izaera edo esentzia ez daiteke gure esentziaren edo izaera soilaren bidez argitu (3. Zat., 1. eta 2. Def. arab.); aldiz, kanpoko kausen ahalmena edo izaera gurearekin konparatuz behar da hura definitu (3. Zat., 7. Prop.