Kabbalah Mazmur 81:3: Sha'arei Orah

This is the meaning of the verse,²¹⁵Psalms 81:4 “Blast the Ram’s Horn-Shofar-שופר on the new moon (of the month of Tishrei), when (the moon) is hidden-Kesseh-כסה for our festival day. For it is a Decisor-Chok-חק for Israel, justice-Mishpat-משפט of the God of Yaakov.” I have already informed you that [Rosh HaShanah [ is the day of remembrance, which is the matter of, “remember us for life.” Therefore, “it is a Decisor-Chok-חק for Israel, justice-Mishpat-משפט of the God of Yaakov.” Know that justice-Mishpat-משפט is the matter of [the Sefirah of] Tiferet-תפארת, and is the matter of Yaakov and the letter Vav-ו of the Name HaShem-יהו"ה. The Decisor-Chok-חוק is the lower end of the letter Vav-ו, which is the matter of justice-Mishpat-משפט and is the matter of Yaakov. It was already mentioned above that the lower end of the letter Vav-ו is called the little letter Yod-י. It therefore is written, “For it is a Decisor-Chok-חק for Israel, the justice-Mishpat-משפט of the God of Yaakov.” It also is written,²¹⁶Exodus 15:25 “There He set for them a decree-Chok-חק and justice-Mishpat-משפט and there He tested them.” It is from the Chok-חוק, which is HaShem’s-יהו"ה quality as the Living God-El Chai-א"ל חי, which is [Rosh HaShanah] the day of remembrance, that a person enters to be judged on this day.