Samnell said:That's Platonism.
I wasn't talking about the Good. The "individual absolutely abstracted from reality" in Descartes is the res cogitans.
There are certain similarities. In Plato the intellect is illumined by the Good. In Descartes knowledge comes by the operation of the individual intellect, with God acting as the Creator of the individual and also the guarantor of the intellect's veracity (as long as it remains focused on the clear and distinct).