4

As far as the three kinds of things are concerned, this whole sensible

world enters into the human soul through "apprehension." The external

sensibles, however, are what first enter the soul through the five doors of

the senses. They enter, I say, not though their substance, but through

their similitudes. These are first generated in the medium, and from the

medium are generated in the organ and pass from the external organ into the

internal, and from there into the apprehensive power. And thus the

generation of the [sensible] species in the medium and from the medium into

the organ and the reaction of the apprehensive power to it [the species]

produce the apprehension of all those things which the soul apprehends from

without.