The Torah menorah in the Mishkan has 7 branches which affix to the 6 Yom Tov and Shabbat. Hence the bnai brit soul has 7 names affixed to these 6 Yom Tov + Shabbat. Nefesh, Ruach, Neshama, Chyyah, Yechida, Nefesh Klalli, and Nefesh Shalom. These 6 + 1 souls dedicated holy to HaShem on those Chaggagim & Shabbat have Divine Names. Yah, Ha’El, El, Elohim, El Shaddai, Eish Ha’Elohim, Shalom. The Talmud teaches that the name Shalom – a Divine Name. These Divine Names remember the Yom Tov + Shabbat throughout the year; something like the rear and front sights of a rifle permit a person to shoot accurately down range.
These 7 Divine Names affix as the k’vanna within the heart to the davening said on each specific day of the week. The mitzva of shabbat requires making the most essential הבדלה. Hence the blessing said over wine at the beginning and termination of the day of shabbat. Why does making הבדלה absolutely essential to observe shabbat? K’vanna (shabbat and yom tov exist as tohor time oriented commandment which require מלכות defined prophetic mussar k’vanna – learned by comparing precedent case studies one against another), separates the understanding which discerns like from like.
For example, what separates the Oral Torah revelation of tohor middot spirits from words: ה’ אל רחום חנון וכו? If a person cannot discern one tohor middah from another then likes that person fails to discern tohor middot from tumah middot. The heart contains two opposing Yatzirot. Hence the kre’a shma writes לבב, which Rabbi Yechuda the author of the Mishna calls Yatzir Ha’Tov vs the Yatzir Ha’Rah.
The Yatzir Ha’Tov through tohor time oriented Av Commandments breaths the Spirit of the 1st Sinai commandment Name, the greatest commandment in the Torah – doing mitzvot לשמה. The sin of the Golden Calf lacks understanding and confuses the Divine Spirit Name רוח הקודש with word translations! Hence the Xtian bible and Muslim koran both worship other Gods of avoda zarah. Monotheism violates the 2nd Sinai commandment. The 10 plagues which afflicted Par’o and Egypt judged the Gods of Egypt. The brit cut at Gilgal calls upon HaShem to likewise judge the Gods of Canaan. The Rashi tefillen based upon the oath sworn at Gilgal; the Rabbeinu Tam tefillen based upon the oath sworn at Sh’Cem.
The examples brought all require making the essential הבדלה. To keep shabbat requires making the essential הבדלה which separates and distinguishes מלאכה from עבודה: skilled labor from unskilled labor. Mesechta Shabbat addresses the verb of מלאכה; whereas mesechta Baba Kama delves into the verb of עבודה. The morning davening concludes with יום ראשון בשבת יום שני בשבת וכו. A person who observes Shabbat observes all the commandments! The Mishkan has the מקום קדוש וגם מקום קדוש קדושים. So too likewise observance of the Mitzva of Shabbat.
On the day of Shabbat, which has the Divine Name Shalom dedicated within your Yatzir Ha’Tov heart, a person sanctifies not doing acts of מלאכה. This dedication not to do מלאכה on the day of shabbat likewise equally sanctifies not doing איסור עבודה on the 6 days of Chol “shabbat”. The mitzva of shabbat observance sanctifies not just the day but the entire week.
Mesechta Baba Kama makes the דיוק on the opening Av Mishna. It makes the required הבדלה which separates and distinguishes between Tam from Muad. Four avot tam damagers and Four avot muad damagers. The דיוק defines the latter as חמס גזל ערוה ושוחד במשפט. A person who sanctifies not to do these Avot muad damages during the week, sanctifies not doing the 39 forbidden labors on the day of Shabbat and therein keeps all the Torah commandments! Hence the Gemara of Shabbat learns precedents from the Gemara of Baba Kama. The study of Talmud – a common law legal system and not a post sealing of the Gemarah codification of statute law halachot codifications. The Rambam’s Yad Chazakah failed to make this critical הבדלה and the court of Rabbeinu Yonah together, (it seems to me) with the majority of the Baali Tosafot which learned the Talmud as common law and not assimilated Roman statute law which relies upon Aristotle’s logic of organizing laws into egg-crate like orders. T’NaCH/Talmud common law as different from Greek\Roman statute law as Shabbat different from both Xtian and Muslim interpretations!