The Plane of Positive Energy is where radiant power manifests, serving as the source of life-giving energy in the multiverse. It is the original source of pure Yang chi (or ki). Before Rolara was formed, the elemental planes were in disarray and total chaos. Yet there was a time before even that chaos. The Positive and Negative Energy Planes were the first and last planes to exist: the Positive Plane is considered the beginning of time, and the Negative Plane is considered the end of time.
The plane is the source of bright, burning radiance. Its energy fuels the conflagration of the Plane of Elemental Fire and everywhere else that fire burns on the Prime Material Plane. It is the light of the stars in the Astral Sea and the light of heaven shining through the sun. All things thrive in its boundless power.