>>132923596Eye of Samsara(Wheel of Life), the abilities of the Rinnegan grants access to 6 dimensions. Ashura Realm = Ashura Path, Animal Realm = Animal Path, etc. It's all based on Buddhism, and Taoism/Shinto.
Rinnegan is impartial, it is Rinne Sharingan without the corruption of Tomoes that has the characteristic of the number 6. Rinnegan is Yin(Moon) and Yang(Sun) merged into balance of life. Tenseigan is Yin(Evening Star) and Yang (Morning Star), characterized as a Star.
If you put the three major doujutsu into order of the Hindu:
Creation: Tenseigan (Yang)
Preservation: Rinnegan (Yang+Yin)
Destruction: Rinne Sharingan (Yin)
This is just a summarized version, grasping Kishimoto (the genius) entire reference and setup is pretty hard.