In Harrison's world, the government has stepped in to try to ensure that everyone is equal, and that no one has their feelings hurt because someone else is prettier, smarter, or stronger than they are. As a result, everyone is pulled down to the same level of mediocrity, and individuality, progression, creativity, ingenuity and beauty have all been stifled. Harrison himself represents the mighty beauty and capacity of the human being, and what we can potentially become if left unrestrained and unfettered. Harrison represents the sheer beauty of mankind's potential--we can do whatever we set our minds to, if people will only let us. If that "hurts" others because we succeed more than they do, that is a price that is worth being paid to achieve success and progression in a society. And, people, instead of sitting around feeling hurt, should get up and move on with their lives.
Harrison's rebellion against the government represents not being willing to accept the moral precepts that his government is preaching. It represents a way of thinking that allows human beings to be individuals, that allows success and achievement, and that refuses to be told by their government how beautiful or strong they can be. His rebellion represents the inner core of humanness, which is agency, and the right to choose for oneself what path they will take, instead of having it dictated by the government. I hope that those thoughts helped; good luck!