Class One. This class explores the השכלה in this מאמר. The three worlds בריאה, יצירה, עשי’ה succeed each other, each later world, lower than the one above it. However to create the physical עשי’ה requires a strength above all the worlds, represented by the words: אף עשיתיו. He also discusses אצילות כממוצע או [ביתר דיוק] כאמצעי as an intermediate for the lower worlds. But the lowest world has the highest source, Chochma brings this into השתלשלות and it includes קדמות השכל ועצמות ומהות. From Chochma comes the power to bring into the lowest level, to make Asiya Gashmi. But it passes through השתלשלות making the worlds shine. The source is higher than Chochma and Atzmus.
Class Two. The Rebbe develops the word idea further. He argues that words come from the essence but they are enlightened and given life from the ‘Midos’ (attributes, Sfiros). This means that the world which is created from His essence [this, the lowest world] has light by passing through the higher ones. In Galus, however, this is not so. There is no light, but there is still a world, created by words (letters) alone, that relate directly to His Essence. In Avoda this is the idea of Emuna that we have always and that puts us in touch with His very Essence.
Class Three. The beginning and the end of the Ma’amar deals with two ideas: 1) How Purim is different than all the other Yomim Tovim that it will be distinct after Moshiach comes, as it represents higher than Hishtalshelus. 2) The two big changes of Purim are in A. Torah, that it became ours against all odds, B. There’s an entirely new level of Yom Tov that is higher than Hishtalshelus.