The Source is an enigmatc supreme being, and as its name implies, the origin of all that is, was, or ever will be. Its origins are shrouded in mystery and unintelligible even to the Celestials. According to the Celestial Adam, in the beginning the Source was alone. Desiring companionship, it created the first Ethereal life. With the help of these new beings, the Source decided to create the Universe. However, the process was corrupted by the arrogance of a Celestial called Lucifer. When the Source gave form to what they had created, the Midplane and Underplane took shape, and life began to emerge there. Jealous of the Source's Creation, Lucifer rallied many other Celestials who were afraid of losing their place in the Source's eyes. A great war raged between Lucifer and his followers and the Celestials who stayed loyal to the Source, but when it became clear that Lucifer's true goal was to overthrow and replace the Source, his allies left him and he was defeated. Stripped of his Celestial essence, he saved himself by crafting a body made from Hellfire and became a being of pure hate, Satan. From Satan came the race of Devils, who in turn begat the race of demons. Unable to return to the Highplane, Satan sought revenge against the Source by destroying his prized Creation from the bottom. Distressed, the Source sought volunteers to descend to the Material Planes and counter the devils. Those Celestials that manifested material bodies of their own became the race known as Gods. The different pantheons managed to erect barriers cutting off the Midplane from the Underplane, trapping the Devils and more powerful Demons in Hell while leaving life in the Midplane free to grow on their own. In the aftermath the Source assigned two of its more powerful Celestial servants to act as Guardians of the Midplane and Underplanes, giving them authority over all other Celestials within those spheres. Just as the true nature of Ethereal life like the Celestials is impossible for even the most advanced and immortal Material beings to comprehend, the Source is beyond the Celestials. As Adam told June Hammer, "as I am to you, so the Source is to my people." As the supreme being of creation, the Source possesses power beyond any magnitude. Despite this, the Source almost never acts directly. When Lucifer rebelled, the Source could not bring itself to harm its favorite son and instead exiled him to the lower planes. Various crisis events come and go that seem to threaten all of Creation with the Source forbidding the Celestials from involving themselves. Adam theorizes that the Source's motivation behind Creation was to be surprised, and if it has to personally step in to save it then the experiment becomes pointless. Regardless, the Source is very fond of the life that has emerged in the Universe and Adam assures a skeptical June that whatever the Source's motivations, at the heart of all of it is love.