faculties of the soul
(Latin: facere, to do)
Qualities by which the human soul is able to act, or proximate principles of human activity, the remote principle being the soul itself, the faculties being the imagination, memory, understanding, will.
Hence the order is soul, one or other faculty, act.
All human acts are ultimately attributed to the person, the ego.
Some moderns, considering faculties as a "bundle of detached powers", independent autonomous entities existing apart from the soul and shattering its unity, have denied their existence.
Faculties of the soul are merely qualities or properties, modes through which the soul acts.
Faculties explain well the changes of consciousness, the essentially different kinds of consciousness, and the variations in capacities or powers, all proceeding from the same soul.
New Catholic Dictionary