One Power is a mystical force in the Wheel of Time series by Robert Jordan. It is divided into two halves: Saidin, which is the male half, and Saidar, the female half. Both halves are essential for channeling the One Power, allowing individuals known as Aes Sedai to perform magical feats. The One Power is central to the series' plot, influencing the balance between good and evil. It is tied to the fate of the world, with its use often leading to significant consequences. The struggle to control and understand the One Power shapes the characters' journeys throughout the story.