The overriding theme of Purim is the saving of the Jews from a mortal threat. Even though God is not mentioned at all in the Book of Esther, from a Jewish perspective, God is the one who is pulling the strings of redemption behind the scenes. The holiday of Purim has become one of the best-loved holidays of the Jewish year. The reasons for this are easy to see. It is a joyous holiday on which everyone just lets go.
Most significant, however, is the paradigmatic nature of the story of Purim. It is not difficult to see how a story in which a small and threatened Jewish community in exile is able to triumph over its foes would prove to be a powerful image for a Diaspora community faced over the centuries with threats from many different sources. The story of Purim, however, holds out the hope that no matter how bad the circumstances, things will turn out well in the end.