The emotional response to darkness has generated metaphorical usages of the term in many cultures, often used to describe an unhappy or foreboding feeling.
Also, the light detecting cells in the human eye (rods and cones) will regenerate more unbleached rhodopsin when adapting to darkness.
[9] The concept of light and darkness holds profound symbolic and theological significance across various religious traditions, serving as metaphors for creation, morality, and the nature of existence.
In the Judeo-Christian tradition, the first creation narrative begins with a void, described as "formless and empty," over which "darkness was over the surface of the deep" (Genesis 1:2).
In Islam, light (nūr) and darkness (ẓulumāt) are frequently invoked in both physical and spiritual contexts, reflecting profound moral and theological truths.
However, unlike some traditions where darkness is portrayed as inherently evil or chaotic, Islam emphasizes that both are under Allah's divine will and serve His purposes.
Light in the Quran often represents guidance, faith, and divine revelation, while darkness symbolizes misguidance, disbelief, and moral corruption.
For instance, believers are often described as being "brought out from darkness into light" (Quran 2:257), a metaphor for their journey from ignorance to divine knowledge.
This dichotomy underscores the moral framework of Islam, where both light and darkness are tools through which Allah tests and guides humanity.
In ancient Greek mythology, Erebus was a primordial deity representing the personification of darkness, particularly associated with the shadowy realm of death and the underworld.
(A Midsummer Night's Dream: I, i)[10] Geoffrey Chaucer, a 14th-century Middle English writer of The Canterbury Tales, wrote that knights must cast away the "workes of darkness".