Antigone is a play which is authored by Sophoies. This play describes the after effects of the Civil War. It so happens that Eteocles and Polyneices who were the sons of Oedipus died while having a fight with each other. So when Crean arrives, he points out that Polyneices shouldn’t be buried.
He states that he hate people who do bad deeds, and such people are a sin for a society. And which is why they ought to be punished and don’t deserve to be buried. Because buried are those who are honored.
It is an example of, theme. Theme would tell you how the mood is set. <em />It's not symbolism, because there was no object to describe that moment, or any past moment. Hope this helps!