The Dividing Line of Plato's Allegory of the Cave Allegory of the Cave by Plato, which can be found in Book VII of The Republic, is among the most well known parables that he has written. This particular allegory calls attention to a vast amount of philosophical concepts that Plato founded throughout the development of The Republic, the most evident of them being the dividing line. The dividing line can best be described as the space amid the world of perceptions in which we exist and the world