Personification is used when the author describes victory coming to Thebes. The tone is an uplifting one when the festivities to be carried are discussed.
If you mean which sentance best represents the moral of the story then it would be the second to last sentence: "At last a Wolf really did come, and the Boy cried, "Wolf! wolf!" as loud as he could: but the people were so used to hearing him call that they took no notice of his cries for help."
