The book of Lamentations emphasizes the impact of your thoughts… of what you say to yourself… of what you call to mind….
“Yet this I call to mind and therefore I have hope: Because of the Lord’s great love we are not consumed, for his compassions never fail. They are new every morning; great is your faithfulness. I say to myself ‘The Lord is my portion; therefore I will wait for him.'” (Lamentations 3:21-24) http://ow.ly/i/q0LbS