Socrates announces now in the dialogue that he has demonstrated the superiority of the just life as a life to be lived, whether it include external rewards or not. But Socrates sees the universe as being essentially moral, and he argues that experience shows us that the just man will receive his just rewards; the unjust man, his just punishment. The greatest of both will be in the life after the death of the body. Socrates illustrates this situation in the Myth of Er. So we turn now to the story of Er.
Part of Er's fate is that he will tell men yet alive his story of life after death. Er is a brave soldier who dies in battle. Ten days after his death, his body is taken home and laid on the funeral pyre, but there Er comes back to life and tells the story of his adventure.
After Er's soul left his body, it traveled with other souls to a wonderful place where there are two chasms in the earth and two above them in the sky. Between the chasms and between heaven and earth sit judges who pass judgment on the souls of men who come before their court. The just souls were directed to take the right-hand chasm leading into heaven; the unjust souls were condemned to the left-hand chasm down into the earth. Er was told to sit and watch the proceedings of the court, for he was to return to life and tell living men his story. As Er watched, he saw souls coming from the exit-chasms from heaven and earth; those coming from earth were weary and careworn and stained from travel; those from heaven were clean, rested, and bright. The souls told Er their experiences: The just souls had been rewarded for their just lives during their stay in heaven; the unjust, punished in the earth, condemned to wander a thousand years below the ground. The unjust told tales of other more evil men, murderers and tyrants, who were still condemned to suffer longer beneath the earth, never to be released again.
