Thoughts on Thinking

I have been reading a book by Kathleen Norris called "Acedia and Me." It has some material early on about very old writings on spirituality. She pointed out that before we started talking about the cardinal sins, monastic writers spoke of "bad thoughts." It got me to pondering how the way I am thinking, the pattern of thought that I allow to continue in my head and heart, leads to some negative attitudes and then behaviors that are hurtful to others. I want to clean up my judgemental thoughts and my worrying. I have a feeling that will lead to more virtue in my life.