Sentry speech on Antigone

The main metaphor in this  passage was that Antigone was juxtaposed onto a bird. It was said by the Sentry that "she was like a bird come back to an empty nest, peering into its bed, and all the babies gone..." The metaphor of a bird is very often used in literature as a symbol of freedom, or a symbol of justice. When Antigone was compared to this, it reveals that Antigone's character is meant to be the main symbol of her own justice, which was burying Polynices, but the main question that is brought up, upon asking this question, is what is the real justice? Is Creon or Antigone right? Antigone has her own version of justice, which Sophocles is trying to get at. When everyone has a different definition of justice, there isn't really justice without injustice, which was expressed during the play through the sentry. The sentry stated that "It's pure joy to escape the worst yourself, it hurts a man to bring down his friends. But all that, I'm afraid means less to me than my own skin. That's the way I'm made." This moment and the other moment with being caught help to develop her character and the main theme that she means well, but the corrupting power in Creon has led to selfishness among him and his people who are to self-centered to do anything about it. Throughout the play up until the end, Creon was selfish, but when the prophet Tiresias stated that he was causing the plague and that he would die, Creon tried to save Antigone but it was too late. The main theme of fate and free will really came into play here, and it was fully developed by the end of the play when the reader starts to think about whether or not it was Antigone's free will or just fate in general that she was caught and sentenced to this.