Revealing Negative Thinking

In the first class with Lynne McTaggert on The Power of Intention, her assignment was to keep a journal of my negative thinking. I consider myself a positive person, so I thought, "There won't be much in my journal." 

Was I ever wrong! I was surprised at the number of times during the day I'm thinking of someone in a critical way--or I focus on something I don't like--or I condemn myself! 

This assignment has had value for me in two ways. First, I am becoming more aware that I lose energy when I'm negative. Secondly, the exercise is working much like a fourth step in revealing my character flaws. Once they are exposed, then I know what to do. But as long as they remain hidden, I'm weakened.

You try it:  Keep a journal of your negative thinking for a few days. What did you learn about yourself?