"In him was life, and that life was the light of all mankind. The light shines in the darkness, and the darkness has not overcome it." John 1:4-5 since the darkness cannot
overcome this Light when we become children of God we have that light in this world of darkness. The truth of this is we have a certain calling to sit and share this same light with the people around us. As this light is the saving grace of christ. "The darkness can not overcome it"