[Schulz] came to see that the better part of his shyness was really vanity, or self-centeredness. "Shyness is an illusion," he would say, late in life. "If you get out and do something and talk to people, you don't have to be shy. Shyness is the overtly self-conscious thinking that you are the only person in the world; that how you look and what you do is of any importance.
David Michaelis, Schulz and Peanuts: A Biography
charles-schulz, illusion, self-centeredness, self-consciousness, shyness, vanity