Darkness, as polar to brightness, is understood to be an absence of visible light. It is also the appearance of black in a color space.
Humans are unable to distinguish color when either light or darkness predominate (W. Wundt, Outlines of Psychology, 1907). In the absence of light, perception is achromatic and ultimately, black.
The emotional response to darkness has metaphorical connotations in many cultures.
Famous quotes containing the word darkness:
“[T]hat moment of evening when the light and the darkness are so evenly balanced that the constraint of day and the suspense of night neutralize each other, leaving absolute mental liberty. It is then that the plight of being alive becomes attenuated to its least possible dimensions.”
—Thomas Hardy (1840–1928)
“A Dungeon horrible, on all sides round
As one great Furnace flam’d, yet from those flames
No light, but rather darkness visible
Serv’d only to discover sights of woe,
Regions of sorrow, doleful shades, where peace
And rest can never dwell, hope never comes
That comes to all; but torture without end”
—John Milton (1608–1674)
“How insupportable would be the days, if the night with its dews and darkness did not come to restore the drooping world. As the shades begin to gather around us, our primeval instincts are aroused, and we steal forth from our lairs, like the inhabitants of the jungle, in search of those silent and brooding thoughts which are the natural prey of the intellect.”
—Henry David Thoreau (1817–1862)