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Some may have trouble understanding who or what the Emperor is supposed to be, in concept...The real-life inspiration for the Emperor was Jesus Christ, and other religious icons that are arguably identical, but simply appearing different to sense-Different avatars, same concealed force of some supreme being that is unknown, unknowable to humanity. This entity could instance itself by allocating the proper massive energy, in line with the laws of quantum physics, and cleaving it into the needed avatars of appearance, in an attempt to unite Humanity under one big Holy Mission, which humanity doesn't actually know as a single greater desired result....Hence why in Warhammer 40k, you see the different referentially grounded beliefs in who or what the Emperor Neoth is...It's different sides of the elephant for each blind man, so to speak. It's just too large, too complicated of a matter for most of individual minds, and only the Roboute Guillimans, Belisarius Cawls, etc. counterparts of the real world can grasp him, especially since Roboute is the Emperor's son, and carries the highest percentage of his gene seed. Going back to the fiction aspect of 40K, very little is known about the majority of the Emperor's life; of who he was and what he did before he emerged as the great Emperor of Mankind, only the Emperor himself remembers.{{Fn|2}} It is said that the Emperor's birth, while a natural process, was actually the result of a scheme created by the wisest and most powerful of living humans at that time: the conclave of [[Shamans]]. These men were powerful psykers with great experience of the [[Warp]]. Finding their souls - and those of Humanity - endangered by the growing perils of the Warp-gods, these psykers decided to pool their power into one human, a being they called 'the New Man'. Already having gained the power to reincarnate themselves (upon death, the shamans' souls would transfer to the Warp, accumulating power enough to reincarnate as human) the shamans entered a suicide-pact. Thousands of them poisoned themselves and sped their souls to the warp at the same time. Presumably pooling their soul-energy and using their reincarnation ability, they brought about the birth of their New Man - the Emperor - one year later.{{Fn|3c}} The Emperor was born to mortal parents on Terra in the 8th Millennium BC. As far back as the history of Warhammer 40k goes, he was known as [[Neoth]], as his primary name, which remained unchanged. Later on, he would be called the Omnissiah, Emperor of Mankind, etc. {{Fn|3b}}{{Fn|46}} in a primitive proto-[[Wikipedia:Hittites|Hittite]] village along the banks of the [[Wikipedia:Sakarya River|Sakarya River]]{{Fn|14c}} in central [[Wikipedia:Anatolia|Anatolia]],{{Fn|31}}{{Fn|46}} manifesting his powers as a youth. While a young adolescent, the Emperor's father was murdered by his uncle. While preparing his father's body for a primitive funeral ritual, he received a vision of his murder. Later, the boy who would become the Emperor calmly approached his uncle and stopped his heart with his psychic abilities, displaying neither sorrow nor malice. According to the Emperor himself, this was the moment he realised that Humanity needed law, order, and the guidance of a ruler. Shortly thereafter, he left his village for the first city of Humanity (likely in ancient [[Wikipedia:Sumeria|Sumeria]]).{{Fn|14c}} Sometime later, the Perpetual [[Erda]] met the Emperor, already a warlord attempting to accelerate Human evolution and guide the race into a superior species. Erda became one of the Emperor's followers as he attempted to seek out and recruit every [[Perpetual]] on Earth to his cause. During this ancient time, the Emperor was known as '''Neoth'''.{{Fn|30}}

Two conflicting theories have been put forward concerning the possible rebirth of the Emperor. Note that at worst these theories could be considered complete fabrication brought about by [[Tzeentch]]ian [[Cultist]]s and the lies of Chaos, as the [[Inquisition]] has decreed. The closest thing to a full rebirth the Emperor has had, as of 40k, is the resurrection of his most closely related son, Roboute Guilliman, Son of the Omnissiah Neoth, by the Excellent [[Belisarius Cawl]]. But it is clear that in any future of the 40k history, that the Emperor is due to return, and smite the chaos-guided leaders, whoever they may be, who took his stead, with or without his Son being present in the battle, though it is most likely that Roboute Guilliman will fight alongside his father to crush Abaddon and his sick-minded, depraved armies, then take over the Warp to eternally punish the Chaos Gods, so they suffer endlessly and maximally. {{Fn|6}}