And of everything, spiritual, animate and inanimate, did We create pairs complementing each other: (night and day, positive and negative, love and aversion, rest and fatigue, mercy and punishment, sea and land, light and darkness, belief and disbelief, life and death, happiness and misery, heaven and Hell, male and female, …). (And when We come to the universe as a whole, there is He Who complements it and sustains it; He is One and He does not need anything to complement Him), that you people may hopefully ponder.