The Internet watches over Harry.
Harry was slow to realize that it's talking to him. He began noticing patterns in the data that it provided. The Internet speaks in it's own secret way.
Harry knows that the Internet sends messages only he can understand. It tells Harry the things that it wants him to do.
The Internet takes care of Harry. When he kills it sends the police elsewhere.
Credit cards often arrive in the mail. The Internet provides Harry with the money he needs to execute his missions.
Harry's work is important. He's helping the Internet change the world.