Class One. 1) Moshe gives instructions the day after Yom Kippur about correcting the sin of the Golden Calf. This requires total Bitul of the Avoda Zara idea on all levels. This is achieved by a totally indifferent attitude toward Parnassa, which makes Parnassa something we do only because we MUST and accordingly one does it with great Mesiras Nefesh יגיע כפיך כי תאכל אשריך וטוב לך.
Class Two. 2) Just as Parnassa is done so indifferently that it ends up being a chore, so too קבלת עול מלכות שמים on the highest level is where the person has no personal interest, only what Hashem wants. This also overturns the sin of עגל which is עבודה זרה.
Class Three. 3) This is the end of the Ma’amar explaining the Pesukim– Vayakheil, to gather all aspects of all Yidden and the world in general, and join them together in the effort of making a דירה לו יתברך בתחתונים. This is through work ששת ימים תעשה מלאכה, so we can have משיח, which is שבת שבתון that is earned through indifferent involvement in מלאכה, as indicated in the very same words: ששת ימים תיעשה מלאכה.