Around that time, the Sansei (三清), composed of 'Genshi-tenson' (Primeval lord of heaven), 'Reihou-tenson' (Sacred treasure lord of heaven) and 'Dotoku-tenson' (Moral lord of heaven), all of which are metamorphosed Tao- gods, appeared in historical documents.
このころには、道の変化した神である「元始天尊」「霊宝天尊」「道徳天尊」の三清が文献上現れている。