The Midrash (9:2) tells us that "Haman had 365 advisors, corresponding to the days of the year, but none of them knew how to advise him as well as his wife, Zeresh. She told him, ‘If Mordechai is a Yid, you must plot and plan wisely how to defeat and kill him because if you don’t plan wisely, you will fail. You must kill him in a way that nobody among his nation was ever killed. If you throw him into a furnace, Chananyah and his friends were saved from a furnace [so Mordechai will also certainly be saved]. If you throw him into a lion’s den, Daniel was thrown into a lion’s den and was saved. Perhaps you will put him in jail, behold Yosef was released from jail. If you put him in a copper pot and light a fire underneath, Menashe prayed to Hashem and was saved from exactly that situation. If you exile him to the desert, Mordechai's ancestors lived in the desert successfully and thrived there. If you blind him, behold, Shimshon killed many Plishtim after he was bound. I suggest you hang Mordechai because we don’t know anyone from his nation that was saved from hanging.' It states, (Esther 5:24), 'This suggestion pleased Haman, and he had the gallows made.'"
This Midrash needs an explanation. Didn't Zeresh understand that if Hashem can save His people from a lion's den, a fiery furnace, and many other situations, He can save Mordechai from being hung, too?
The Agra d’Kalah (Eikev) answers that when Yidden study and speak about a miracle that occurred in the past, it triggers Hashem to perform that same miracle again. A source to this concept is in Tehillim (60:6), "You give to those who fear You, miracles so they can receive more miracles." They talk about Hashem's past miracles, which causes them to happen again.
Zeresh said, "If you plan to throw Mordechai into a fiery furnace, the Yidden will study the story of Chananyah, Mishael, and Azaryah, and that will draw down the miracle for Mordechai, too. If you plan to place Mordechai in a den of lions, the Yidden will discuss the miracle that happened to Daniel, and Mordechai will be saved." Therefore, Zeresh advised Haman to harm Mordechai in an unprecedented manner so that the Yidden wouldn't have from where to draw down a miracle. Their mistake was that they didn't realize that Mordechai was a great tzaddik in his own right, and a brand-new miracle would be created for him.
It states (Esther 9:28), “these days are remembered and happen...” Rebbe Yehoshua of Belz zt’l explains that this means that when we "remember" the miracles and speak about them, they "happen." When we study the miracles of Purim, we draw down those miracles to occur again. Each year, there is הוא ונהפוך, and Hashem saves us, as He saved us in those days.
The Bnei Yissaschar writes, “It seems to me that we are saved every year in the merit of reading the megillah and giving matanos l'evyonim.”
One of the brachos on the megillah is שעשה הזה בזמן ההם בימים לאבותינו ניסים, Hashem made miracles for our forefathers in those days at this time. The Sfas Emes (7660 והימים ה"ד) asks: The miracles didn't occur on the 14th of Adar. They happened on the 13th of Adar. So why do we say הזה בזמן, that the miracles happen on this day? The Sfas Emes answers that we are blessing Hashem for the miracles that happen each year on the 14th when we read the megillah.
The Eretz HaChaim (from the Be'er Mayim Chaim) explains the Gemara (Megillah 7.) that Esther requested from the Chachamim, לדורות קבעוני, that they should establish Purim as a holiday for all generations. She wanted this so that the miracles could recur each year. This is because when Yidden speak about a miracle that occurred, it causes the miracle to happen again, as it states (Koheles 1:9), “if you discuss a miracle, that will cause it to occur again.”
The Tiferes Shlomo (Rimzei Purim, בגמרא ה"ד) writes that the one who reads the megillah unrolls the entire megillah before he begins reading it to demonstrate that good hashpaos and salvations open for the Jewish nation at this time.
The Gemara (Megillah 4:) says, עניים של עיניהם מגילה למקרא נשואות, that the poor look out for the megillah. The Tiferes Shlomo explains that the poor look forward to the megillah...
