The Emperor helped humanity as a whole survive and prosper through the long millennia. In various eras of human history he intervened through various personas, some of them well-known historical personages, to guide Mankind, though such interventions were always brief and shrouded in legend and historical mystery. At the end of the Age of Strife the man who would become the Emperor finally took a direct, public, and permanent role in shaping the future of humanity, believing that the damage done to the human race by 5,000 years of terror, isolation and violence could not be reversed unless he openly guided humanity as its leader. As such, he shed all his prior identities and simply revealed himself on Terra as the Emperor of Mankind, determined to unite the entire species under his stern but benevolent rule and replace a culture of superstition, fear, communism with a culture of knowledge, courage and liberty.Mary, Empress of the Coming Victory
"Things follow too slowly upon each other, but the great Queen of Heaven is at hand; the Lord's power is Hers. Like mist She shall scatter Her enemies. She shall vest the Venerable Old Man with all his former garments."
Credit to poster HOO @ Gornahoor.net