Phaedo
Socrates offers four arguments for the soul's immortality:The scene is set in Phlius where Echecrates who, meeting Phaedo, asks for news about the last days of Socrates. Phaedo explains why a delay occurred between his trial and his death, and describes the scene in a prison at Athens on the final day, naming those present. He tells how he had visited Socrates early in the morning with the others. Socrates' wife Xanthippe was there, but was very distressed and Socrates asked that she be taken away. Socrates' relates how, bidden by a recurring dream to "make and cultivate music", he wrote a hymn and then began writing poetry based on Aesop's Fables.
Phaedo
In order to alleviate Cebes' worry that the soul might perish at death, Socrates introduces his first argument for the immortality of the soul. This argument is often called the "Cyclical Argument". It supposes that the soul must be immortal since the living come from the dead. Socrates says: "Now if it be true that the living come from the dead, then our souls must exist in the other world, for if not, how could they have been born again?". He goes on to show, using examples of relationships, such as asleep-awake and hot-cold, that things that have opposites come to be from their opposite. One falls asleep after having been awake. And after being asleep, he awakens. Things that are hot can become cold and vice versa. Socrates then gets Cebes to conclude that the dead are generated from the living, through death, and that the living are generated from the dead, through birth. The souls of the dead must exist in some place for them to be able to return to life.