The document discusses how body language and posture can communicate non-verbal signals about people's emotions, intentions, and psychological states. It describes an experiment showing that striking high power poses (taking up more space) versus low power poses (taking up less space) for two minutes can influence hormone levels and risk-taking behavior. Specifically, high power poses increased testosterone and decreased cortisol, leading volunteers to make riskier choices. The document concludes that practicing high power poses can boost confidence in situations like job interviews by conveying qualities like power, optimism, and self-belief.