Quote
"You want it darker We kill the flame"
"Returning hate for hate multiplies hate, adding deeper darkness to a night already devoid of stars. Darkness cannot drive out darkness: only light can do that. Hate cannot drive out hate: only love can do that."

Darkness is the condition resulting from a lack of illumination, or an absence of visible light.
"You want it darker We kill the flame"
"God is the ally of those who believe. He brings them out from darknesses into the light. And those who disbelieve - their allies are Taghut. They take them out of the light into darknesses. Those are the companions of the Fire; they will abide eternally therein."
"Haunted trees covered behind the curtains of their own leaves stare at the dark from the fringe of streets."
"Or (the state of a disbeliever) is like the darkness in a vast deep sea, overwhelmed with a great wave topped by a great wave, topped by dark clouds, darkness, one above another, if a man stretches out his hand, he can hardly see it! And he for whom God has not appointed light, for him there is no light."
"I see skies of blue and clouds of white The bright blessed day, the dark sacred night And I think to myself: what a wonderful world."
"Black and more black the midnight grew, Black and more black was the water’s hue ; Then a ghastly sound on the silence broke, And I thought of the dead beneath the oak."