"I seem to remember telling you both that I would have to expel you if you broke any more school rules," said Dumbledore.
Ron opened his mouth in horror.
"Which goes to show you that the best of us must sometimes eat our words," Dumbledore went on, smiling. "You will both receive Special Awards for Services to the School and...two hundred points apiece for Gryffindor."
Harry potter and the chamber of secrets
I don't exactly understand "the best of us" here. What does it mean?