This realization, according to [Aristotle], is twofold. Either it is potential, as that of Hermes in the wax, provided the wax be adapted to receive the proper mouldings, or as that of the statue implicit in the bronze; or again it is determinate, which is the case with the completed figure of Hermes or the finished statue.

Diogenes Laertius Lives of the Philosophers bk. 5, sect. 33