 Finally, the perception of the soul’s action is “to sense in itself the image which it has formed in itself” (or, “the turning of the eye &lt;of the soul&gt; upon itself, in and by means of which the image is sensed” (DSF 125), that is, the perception of the object. In other words, the sensory soul turns its eye upon itself and sees the sensible object through the image made by itself. It does not distinguish the image in the sense organ from the image in itself (DSF 104), and neither image is that which is perceived. The object of perception is the external thing (DSF 110–11) and not the image by which the thing is known (quo res cognoscitur) (QLIS 89, 280).