Explain in detail what Charlie means by his quote at the end of part one, “And in that moment, I swear we were infinite.” Why does he say this? What does it mean to him and his friends?

As he drives through Pittsburgh with the girl he loves and his best friend, Charlie starts the process of living in the moment and soaking up what the present has to offer. Many times throughout his letters, Charlie describes the situations of other people and tries to delve deeper into the causes of their actions, but this drive marks the first instance of firm focus on himself and on how he is feeling in a precise moment: infinite. He and his friends can do anything or feel anything: happiness is not out of reach. Charlie's tendency to reflect first is not abandoned in this scene, since he still remarks that the lights represent everything that makes him wonder. But now, he is able to observe and participate simultaneously. His feelings of infinity are the culmination of many influences - sexual awareness of Sam, friendship with Patrick, and the sheer happiness of being a group, of enjoying music and laughter. Together, they are endless.