Thoughts are between us

Yesterday, I was at work when my boss walked in. I was thinking about how he approved of one of my co-workers over me, but that wasn't fair, because she was lazy, or something like that. A few seconds later, I felt a burst of anger at me. I feel that he had read my mind, and that I could feel the emotion behind his reaction. I decided that having such a boss was a teaching experience, because if you want to be a spiritual master, you can't just think whatever you want, and be unaware of the effect it has, not only on your life, but on other people.