It does not cover, nor is presented by the prophet as covering, all the facts of experience. Every man has his share of sunshine, but still it is true of all who are not living in dependence on and communion with God, that they are but travellers in the dark.
Scripture uses the image of darkness as symbolic of three sad facts of our experience: ignorance, sin, sorrow. Are not all these the characteristics of godless lives?
As for ignorance--a godless man has no key to the awful problems that front him. He knows not God, who is to him a dread, a name, a mystery, He knows not himself, the depths of his nature, its possibilities for good or evil, whence it cometh nor whither it goeth. He has no solution for the riddle of the universe. It is to him a chaos, and darkness is upon the face of the deep.
As to sin, the darkness of ignorance is largely due to the darkness of sin. In every heart comes sometimes the consciousness that it is thus darkened by sin. The sense of sin is with all men more or less--much perverted, often wrong in its judgments, feeble, easily silenced, but for all that it is there--and it is great part of the cold obstruction that shuts out the light. Sin weaves the pall that shrouds the world.
As for darkness of sorrow--we must beware that we do not exaggerate. God makes His sun to rise on the evil and the good, and there is gladness in every life, much that arises from fulfilled desires, from accomplished purposes, from gratified affections. But when all this has been freely admitted, still sadness crouches somewhere in all hearts, and over every life the storm sometimes stoops.
We need nothing beyond our own experience and the slightest knowledge of other hearts to know how shallow and one-sided a view of life that is which sees only the joy and forgets the sorrow, which ignores the night and thinks only of the day; which, looking out on nature, is blind to the pain and agony, the horror andthe death, which are as real parts of it as brightness and beauty, love and life. Every little valley that lies in lovely loneliness has its scenes of desolation, and tempest has broken over the fairest scenes. Every river has drowned its man. Over every inch of blue sky the thunder cloud has rolled. Every summer has its winter, every day its night, every life its death. All stars set, all moons wane. Bare ruined choirs where late the sweet birds sang come after every leafy June.
Sorrow is as deeply embedded in the necessity and constitution of things as joy. God hath set one over against another, and hath made all things double.'