Purim: Esther's Redemption

Why does Esther invite Achashverosh to a seuda? Why not just make her request to save Klal Yisrael right away? Why invite him to a second seuda? Esther HaMalkah understood the psychology of Achashverosh and Haman and she exploited it to save Klal Yisrael. In this epic tale we learn what happens when the fragile, paranoid, manipulative ego meets the infinite power of God.