The document discusses emotional intelligence, which is the ability to identify and manage one's own emotions and the emotions of others. It notes that developing emotional intelligence allows one to use emotions to motivate oneself and others. The document provides six principles of emotional intelligence and tips for developing emotional intelligence at work, including integrating rational and emotional responses, accounting for emotions in decision making, and assessing one's own emotions without ignoring them. It advises reading people without judging and considering other perspectives as part of working as an effective team.