Kav Hayashar: Blessings On The Megilah
The 15th of Adar is the Yahrtzeit of Rav Zvi Hirsch (ben Aharon Shmuel) Kaidanover of Vilna and Frankfurt (1712). The son of the Birkas Shmuel, he himself was the author of Kav Hayashar, a sefer which Reb Elimelech of Lizensk learned through 102 times.
When we recite the blessing, “Who sanctified us with His commandments,” we must keep in mind that we must approach each Mitzvah with a high level of sanctity, prepared to achieve even more through the commandment we are about to fulfill. This is especially important as we respond “Amen” to the blessings before the reading of the Megillah; all are happy and excited, so we must make a special effort to approach the reading with great sanctity, prepared to be sanctified even more.