Chapter 080 - The Appetitive Faculty in General

Appetite is a particular faculty of the soul, inasmuch as it is found after a higher mode in forms possessed of understanding than in those which are unintelligent. For in the latter everything is determined to its own natural being alone; while in the former it is determined, not only to its own being, but also to the being of others; and intentionally.^ Hence the soul is in a manner all things; and since forms exist after a higher mode where there is intelligent being, it follows that, in such, inclination exists in a mode superior to mere natural inclination. This is called intellectual appetite, as opposed to natural appetite.

Moreover, the intellectual appetite is a different faculty from the sensitive appetite, because these faculties are distinguished according to the difference of actuations and motions; and since apprehension by sense is different from apprehension by intellect, the faculties also are different. And motives must be proportioned to things which are moveable; actuations to such as are passive.