The Major General was right. A strategy built on emotions will be inconsistent at best, and disastrous at worst. An emotion is a response to a thought that expresses itself in the body. That is why we call them feelings. We feel the emotion in the body.
Emotions are the body's response to a thought.
An emotion responds to a thought and soon that emotion effects other thoughts as well as actions which in turn express themselves in more emotions felt in the body. We build an interactive cycle between thought, feeling, and action. Most traders say they don't want to experience any emotion. They want to respond like a computer, a machine. Traders aren't isolated machines unconnected to a feeling body.