Allegory of the Cave
Plato’s allegory states that there are prisoners chained together in a cave. Behind the prisoners is a fire, and between the fire and the prisoners are people carrying puppets or other objects which cast shadows on the wall. The prisoners watch the shadows, believing them to be real.
Plato admits a prisoner could escape the cave and see a whole new world. The outside world would seem so much more real that the prisoner would try to free the others.
However, the sunlight would make him blind in the cave and the chained prisoners would see that and would think the cave is safer.