"Reb Meir Soloveitchik related that the Brisker Rav once asked: Why is the wording of the last oath different from the first two? In the first two (Shir Hashirim 2:7 and 3:5) it says "If you arouse and if you awaken," and in the last one (8:4) it says "Why do you arouse and why do you awaken?" The answer is, he said, that the first two oaths are said to the Jewish people before they make any attempt to throw off the yoke of exile. "Do not do it..." for if you do it will be bitter. But Shlomo Hamelech foresaw in his ruach hakodesh that there would come a time when the Jews would indeed try to force the end. After they have already tried, and seen the bitter consequences ("I will permit your flesh") Hashem calls to them: Why do you continue in your folly of fighting with the nations? Don't you see what the results are? Why are you asking for more?" (Uvdos Vehanhagos Leveis Brisk, v. 4 p. 187)
will be similar to the Exodus. Israel will not force the hour or take any physical action toward the redemption, but rather everything will be done on its own, an act of Heaven. In the miracle of Purim, on the other hand, Mordechai forced the hour by sending Esther to the king in violation of the law, thus endangering her life, although there were still many months left before the fulfillment of Haman's decree. Perhaps Jews would learn from this story that now as well, we must force the hour and take action to bring mashiach by force. Therefore, we do not mention the miracle of Purim daily."