The Divinity within us all, according to the Believers of the Source.
The Source is seen as the font of all life, and each being has a spark of the Source that beckons it to ascend and return. It is said that the Powers are as close to the Source as one can get while still remaining an individual. When Powers ascend (as all living things can, according to the Godsmen), they join again with the Source.
It is popular in some circles to conflate the Source with the Great Unknown of the Athar.