Reincarnation

From A Wheel of Time Wiki

A rebirth occurs whenever a soul is reborn into another body, almost always to carry out a specific task. As the Ages pass by the Wheel will often spin out people several times.

There is one case of prophesied reincarnation, the Karaethon Cycle. It tells that one day, Lews Therin Telamon, the Dragon, would be reincarnated as the Dragon Reborn.

Heroes are another example of souls that are constantly reborn to a specific purpose. Heroes are usually kept in Tel'aran'rhiod until their rebirth. The Heroes are summoned by the Horn of Valere.

Of course, since Mat had the holes in his memory filled out he seems to have the lives of many men in his head. these are generally regarded to be either his past lives, or men who came to the The Finn, but the truth is not confirmed.

According to Semirhage, in the Age of Legends this concept was well studied. Sometimes voices of madness were of the affected persons' past life, and reintegration with these people was almost always impossible.

Rand al'Thor seems to have Lews Therin Telamon's voice in his head. Whether this is just a side affect of the Dragon's rebirth or something comletely different is not known.