How long must I wrestle with my thoughts and every day have sorrow in my heart?
How long will my enemy triumph over me? Look on me and answer, O LORD my God. 
Give light to my eyes, or I will sleep in death; my enemy will say, I have overcome him, and my foes will rejoice when I fall.
 But I trust in your unfailing love; my heart rejoices in your salvation.

Psalm 13:2-5