Gloom and darkness were driven away, and life prospered on the illuminated earth. Darkness cannot illuminate itself. Light must he brought in from another source to replace darkness. This applies in the spiritual realm as well as in the natural realm or physical realm. Light and darkness stand in direct contrast to each other.
Spiritual darkness represents sin, evil, ignorance, decay, and death.
Spiritual light, on the other hand, represents goodness, purity, strength, knowledge, truth, life, and joy. The children of light are those who have been called out of the darkness of sin and unbelief by Christ and made God's own through the gracious work of the Holy Spirit. As citizens of the kingdom of light they are pilgrims on the earth. We have the duty to let our light shine by leading a life that is pleasing to God. Our deeds as well as our words are to show clearly and unmistakably that we ore children of light.