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edit...The Sixth (type of song is) הללויה Halleluyah (praised is Hashem). Halleluhu הללוהו this is ה"ו, about this is said, "Leil shimurot hu laShem/ it is this same night of salvation unto Hashem" (Ex. 12:42), and this is the Middle Column, and the secret of the matter, "Hashmi'u hallelu w'imru/ Sing aloud in praise and say: Hashem save your nation the remnant (SAR) of Yisroel!" (Jer. 31:6), to fulfill the verse, "Just like the days you left Egypt I will show the same wonders" (Micha 7:15).
And the secret of the matter - "מה שהיה הוא שיהיה / that which was, is the same thing that will be" (Ecc. 1:9), and in it, "ממכון שבתו השגיח from the place he dwells he watches" [Acrostic Moshe] (Psalms 33:14), because he is in the form of the Middle Column. At that that time will be fulfilled the secret of the Mishnah which says one can eat (Chametz, evil) all of the fourth (hour, millenium), and let it hang all of the fifth (hour) which is the fifth millenium, and you burn it in the beginning of the sixth (hour) which is the sixth millenium.
In order not to separate between the sixth which is the Middle Column [Waw] and between the Seventh [=Nuqva the female the Hei] which is his soul mate, one needs to destroy all the sour dough (SAR) and chametz, which is the mixed multitude, in order not to see it between the sixth which is the ו' and the seventh, as it says about it, "seven times a day I praise you" (ibid. 119:164). Because the mixed multitude separated between the sixth and the seventh at the giving of the Torah, like we have said, "And the nation saw that Moshe was בשש delayed" (Exo. 32:1), as we have explained (the word) בשש, in the sixth hour they made the Calf and they separated between the ו-ה which is between the sixth and seventh, so too Hashem will separate them (from the Jews) between the sixth and the seventh.
Because of them, there's the split matzah, poor man's bread - poor precisely. At that time [of the Redemption] it will be complete just like its partner which is the whole matzah, as it is written (Isa. 30:26), "And the light of the moon will be like the light of the sun..." And why is it a split מצה matzah? Because the Waw, her leg [of the Hei] has gone away to be a מצוה commandment. The split matzah is left with Dalet; therefore the the split matzah is a Dalet, the whole matzah is the Hei; because of this we say the complete Hallel and the incomplete Hallel on Pesach in order to represent the complete matzah and the split matzah.
And we say Maror (bitterness) because the ו' has separated from the ה' and this caused "and they made their lives bitter" (Exo. 1:14), there is מרור and there is מרה as it is written, "call me מרה because ש-ד-י Hashem has made me bitter" (Ruth 1:20) in קשה hard work in קשיא questions, with חמר material in קל וחמר (a conclusion inferred from a lenient law to a strict one), between the nations of the world.
And who caused this? The י' from the name ש-ד-י which is the imprint of the covenant that Moshe gave to the mixed multitude. Because of this Moshe fell from his level, as it is written, "Go, descend because your people caused destruction" (Exo. 32:7); it says 'your nation' not My nation. Through his hands in the future the Shechinah will be united with Hashem; because it is he [Moshe] that separated them [the Sh' and H' due to his Erev Rav]; therefore he needs to unify them [the Sh' and H'], to rectify what he [Moshe] erred. All the friends got up and kissed him and said, "If we hadn't come into the world except to just hear these words it would be enough!".
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