-Modern philosophy of mind can neither critique nor benefit from what Plato, Aristotle, or St. Thomas say about mind until it recognizes an object of thought and sensation. It is very frustrating to read book after book of philosophy of mind without anyone actually bothering even to ask what sort of thing mind knows. Aristotle stayed on this level for a very long time, and with good reason, since our experience with what we know- as known- is direct, immediate, irrefutable, and requires no specialized experience.
-To know that one knows is easy, what he knows is a great deal harder, but is still based on interior experience- but to get to knowledge as such is extremely difficult.
-The awareness of knowledge is an immanent action. Immanent actions as such are not metrical, even when they presuppose something metrical. Measurement simply is a transitive activity. No one can say he has measured while he is measuring; but thought consists in having thought while someone is thinking. On this point, there is an abyss between the scientific method (which is essentially of the metrical) and a philosophy of mind that recognizes immanence as such.
–Much of the philosophy of mind I read (especially the neurological stuff) is extremely good. St. Thomas could only say that knowledge is always abstracted from “the phantasm”, but these neurobiologists can describe the phantasm in immense detail (which is a more perfect account, by the way- and one which the thomistic account is ordered to.)
-A note on the above. “The immateriality of the intellect” often seems to be taken as meaning “a thought for which a PET scan does not light up”. One could find an exhaustive refutation of such “immateriality” in Aristotle and St. Thomas. For that matter, even Plato could deny such immateriality. We at least need something to start the recollection, don’t we? Isn’t lighting up a PET scan, for Plato, confirmation that you are using your body to know?
-To come full circle, the whole proof for the immateriality of the human mind is based on beginning with the object of thought- which is known in a way that prescinds from the determination of time and individual mutable existence- regardless of the truth or falsity of our belief or the existence of the object.