According to search-discovered classical Islamic scholarship, the principle of being 'created in pairs' (Azwajan), as stated in Quran 78:8, is a profound sign of Allah's creative power and wisdom. Tafsir authorities like Ibn Kathir explain that its primary meaning is the creation of humanity as male and female, establishing a system of complementarity for procreation, tranquility, and societal foundation. This concept is further emphasized in Quran 92:3, where Allah swears by His creation of 'the male and the female.' Al-Tabari connects the Arabic root (z-w-j) to pairing and coupling, confirming this primary interpretation. However, the principle extends universally; scholars note that verses like 51:49 ('And of everything We have created pairs') indicate that duality—such as night and day, life and death, and even subatomic particles—is a fundamental law in all of creation. This universal interdependence in creation serves to highlight the absolute Oneness (Tawheed) of the Creator, who is unique and without a pair.