https://en.wikipedia.org/wiki/Dualism_in_cosmology#In_Hinduism
yīnyáng, lit. "dark-bright", "negative-positive
https://en.wikipedia.org/wiki/Yin_and_yang
https://en.wikipedia.org/wiki/Dualism_in_cosmology#Theistic_dualism
https://en.wikipedia.org/wiki/First_Council_of_Nicaea