Why did Jeung-san Sangjenim come to earth?

Sangjenim incarnated on earth as the mortal man Gang Jeung-san for the purposes of: curing a monstrous disease born of the strife that had afflicted both heaven and earth; delivering humanity through the coming epoch of cosmic transition known as gaebyeok (“renewal” or “a new beginning”); guiding humankind in building the ensuing Paradise of Immortality.