Psalm 139:12

even the darkness is not dark to you; the light is bright as the day, for darkness is as light with you 

I've reflected and written on this verse a number of times in the past, and I don't have a groundbreaking new insight for you. I do, however, have the gospel. 

Today may be the most messed up day of your entire life. But if you have Jesus, you have the light of the world. You have hope. You have life because He is all light and no dark and nothing is too dark, miserable or difficult for Him. This is the God who rose from the dead! Death died because Jesus rose from the grave. This is the light that shines in your darkness, in every darkness. This is the light that is your life. 

In him was life and the life was the light of men. The light shines in the darkness and the darkness does not overcome it. John 1:4-5