Glaucon tells a story from Plato's The Republic about the Ring of Gyges. In the story, a shepherd finds a magic ring that makes the wearer invisible. Using the ring, the shepherd is able to seduce the queen, kill the king, and take over the kingdom. Glaucon argues that if anyone had such a ring, they would not remain just, as injustice appears more profitable. Plato responds that true happiness comes from living a virtuous life, as injustice leads to inner turmoil while justice leads to tranquility. The story is meant to show that people only act justly out of fear of punishment, not because justice is inherently good.