For practical purposes, the double is the self in eternity, but can be visualized as the “vessel” into which the warrior uploads his consciousness and identity through the process of living impeccably.
All warriors can develop a double, though most remain unaware of the existence of the double.
The double is the energy body personified and occasionally even manifested in ordinary awareness, developed through Dreaming to a point of extreme cohesion.
The double may take on a life of its own for all intents and purposes.