This week we read Vayikra and HaChodesh, which both discuss the offering of קרבנות, sacrifices. The word קרבן means to come close.. Rashi writes that the word ויקרא is a term of affection that is used regarding the angels. The angels are in close proximity to HaShem. We find that the angel ascended to heaven in the flame of the Korban (Shoftim 13:20). This indicates that we are seeking to come close to HaShem with our Korbanos, and for this reason the angel ascended to heaven on the flame of the Korban. Thus, the term ויקרא, said regarding the angels, is directly related to the sacrifices offered by the Jewish People. When we bring sacrifices we are essentially ascending to heaven and coming closer to HaShem.
In a similar vein, the parasha of HaChodesh describes the first sacrifice offered by the Jewish People, the Korban Pesach. The Medrash (Baal HaTurim Bamidbar 29:2 citing Pesikta §40) states that regarding all of the sacrifices the Torah states והקרבתם, and you will bring, whereas regarding the sacrifice of Rosh HaShanah, it is said ועשיתם, and you will do. This teaches us that on Rosh HaShanah it as if we are transformed into a new entity. We can suggest that prior to the Exodus the Jewish People had not offered sacrifices collectively, and now that they had offered the Korban Pesach, they were transformed into a new entity. Thus, for the Jewish People, the liberation from Egypt was akin to a Rosh HaShanah. Indeed, the Gemara (Rosh HaShanah 11a) states that the servitude to the Egyptians ceased on Rosh HaShanah. The first Pesach was when the Jewish People became close to HaShem, similar to a Korban, which we offer to HaShem to come close to Him.
HaShem should give us the opportunity in the month of Nissan to renew our connection to Him and we should merit the fulfillment of the Gemara (Ibid) that states that just like we were initially redeemed in Nissan, so too now we should be redeemed in the month of Nissan.
Have an Amazing Shabbos and a Good Chodesh!