The document discusses how body language and posture can influence confidence and emotions. It suggests that acting confident through open body language such as standing up straight, making eye contact, and smiling can prime the brain to actually feel more confident over time. Specifically, saying positive goals while sitting up straight with open body language makes them feel more achievable than saying them while slouching or with closed body language. Confident people also move slowly and make eye contact with relaxation rather than darting their eyes around nervously.