Past traumas, fear, doubts and unforgiveness can keep you in a place of darkness.  If you need to revisit the place where your stresses began, let the spirit of God be the guide to take you back to those places. You don't necessarily have to revisit if it was a physical place, you could revisit those places in your mind and in your heart with the spirit of God that's within you. Just as the earth was without form and void and "darkness was upon the face of the deep and the spirit of God moved", so will the spirit of God move you out of your place of darkness and into his light.