The principle of the Mapuche worldview is duality. The Mapuche believe in energies, which can be both negative and positive energies. Everything that exists is conceived from absolute duality (night-day, old-young, man-woman) That is why there exists Elmapun who left (created) the earth and all the existing nature. There is also Elchen who left (created) all the Mapuche. When making their plea, the Mapuche always mention duality, it is for them that they say Celestial Ancient, Celestial Elder. In ngillatun the owner-protectors of places of ngillatun and all the surrounding owners-protectors are invoked.