Part of it I think is our primative brain telling us there is a tiger behind the bush that is going to eat us. When my thoughts are in a negative loop I just don't believe them. I go to gratitude and can tweak it back to the positive. Am I hungry,tired,lonely,angry,do I need a meeting? If I watch the news or bad stuff on tv too much I can pick up a negative vibe and I have to put it away awhile. I listen to meditation tapes,take yoga,keep positive friends, and love the Eckart Tolle books....A New Earth helped alot. SR is great too....because I get lots of help doing life here.......Happy New Year!