Full Idea
Faculties are either complete fictions, or nothing but metaphysical beings or universals, which are used to forming from particulars (as 'stoneness' is to a stone).
Gist of Idea
Faculties are either fictions, or the abstract universals of ideas
Source
Baruch de Spinoza (The Ethics [1675], II Pr 48S), quoted by Stephan Schmid - Faculties in Early Modern Philosophy 3
Book Reference
'The Faculties: a history', ed/tr. Perler,Dominic [OUP 2015], p.170
A Reaction
So they are, at best, the sources of our concepts. Does that mean one faculty for each concept, or one huge concept-generating faculty?