The belief that entities and concepts often appear in pairs -- typically one good and the other bad. The religion of Zoroastrianism recognizes one all-good deity and one who is all-bad. Most conservative Christians believe that two, very powerful, supernatural powers influence the world: God and Satan.
DUALISM
Meaning of DUALISM in English
English glossary of religious terms. Английский глоссарий религиозных терминов. 2012