Plato meant that the relationship between the darkness in the cave and the outside world corresponds to the relationship between the forms in the natural world and the world of ideas. Not that he meant that the natural world was dark and dull, but that it was dark and dull when compared to the clarity of ideas. A beautiful landscape photo is not dark or dull. Poster Nurses Be strong be brave be humble be badass. But it’s just a photo. The story of the cave is found in the Republic of Plato. In this dialogue, Plato also describes a picture of the “ideal state”, which is an ideal, ideal, or utopian state.