When I sit in darkness, the Lord will be a light to me. 

When you pass through the waters, I will be with you; and through the rivers, they shall not overflow you. When you walk through the fire, you shall not be burned, nor shall the flame scorch you. For I am the Lord your God, the Holy One of Israel, your Savior. § I will bring the blind by a way they did not know; I will lead them in paths they have not known. I will make darkness light before them, and crooked places straight. These things I will do for them, and not forsake them.Yea, though I walk through the valley of the shadow of death, I will fear no evil; for You are with me; Your rod and Your staff, they comfort me. § Whenever I am afraid, I will trust in You. In God (I will praise His word), in God I have put my trust; I will not fear. What can flesh do to me? § The Lord is my light and my salvation; whom shall I fear? The Lord is the strength of my life; of whom shall I be afraid?

Mic. 7:8;  Isa. 43:2; 3;  Isa. 42:16;  Ps. 23:4; Ps. 56:3; 4;  Ps.27:1