For an image, since the reality after which it is modeled does not belong to it, and it exists ever as the fleeting shadow of some other, must be inferred to be in another (that is, in space), grasping existence in some way or other, or it could not be at all. But true and exact reason, vindicating the nature of true being, maintains that while two things (that is, the image and the space) are different, they cannot exist one of them in the other and be one and also two at the same time.
Plato, Timaeus 52c-d, Collected Dialogues, trans. Edith Hamilton and Huntington Cairns (Princeton: Princeton University Press, 1978)
