Creon learns that his laws were too rigid and inflexible, and this caused plenty of misfortune. thus he essentially learns the lesson that moderation ("the middle road") is healthier than any extreme. This was a really vital purpose for the Greeks. For Sophocles, it's going to even have had one thing to try and do with the desire of the gods - a minimum of that's however it's in all probability purported to be understood within the context of the play: The gods need man to be moderate, and if he oversteps his bounds, they'll penalise him. The misfortune that befalls individuals in Sophocles' plays, thus, will be seen because the anger of the gods. however in fact the delineated events are merely Sophocles' own messages to his society regarding
