It would be like this:
The Juubi after eons of existing has gained a collective consciousness, it watched with curiosity at humanity's interpersonal relationships, it began to manifest what human call emotions, then one day, an evil man who calls himself a prophet, discovered the art of wielding chakra, he began to specialize in sealing techniques which his descendants became known for, the prophet went and search for the beast of legend to usurp its' power, he found it and did battle with it but the Juubi's power was too strong, the man lay dying, the Juubi in his mercy, gave his essence to the man, and allowed itself to be sealed inside him, the consciousness of the man subsided and only the being of the Juubi remained, great awe and wonderment did the Juubi feel inside his new body, it could finally experience what humans feel, what humans called "love" so he began to teach the nature of chakra to the people, and unlike the shell of the man that encased him, the Juubi shared the art of Ninjutsu, people revered him and worship him as a god, and he became known as Rikudou Sennin: The Sage of the Six Paths.
