Chasidut к Йона 2:3

And this is the aspect of "lechem mishneh" (double portion of bread) of Shabbat: the aspect of teshuvah, as explained. This is because the essence of the lechem mishneh is the continuation of the manna that fell on the sixth day , a double portion, and on Shabbat nothing fell at all. This is because the mannah has the aspect of awareness, as our teacher z"l said (see siman 56) and Israel merited in the merit of Moshe that on the sixth day a double portion for Shabbat, and on Shabbat nothing fell. This is because in the six days of the week, in which there are clarifications, the manna fell, the portion for each day on that day, according to the clarification of that day. And this is the aspect of teshuvah of most of the people - it is through teshuvah that they clarify good from bad, fit from unfit and so on. And this is the aspect of the clarification that is done in each of the six days of action, which correspond to the six orders of the Mishnah, which are the aspect of fit and unfit, forbidden and permitted, pure and impure. And on the sixth day the double portion fell, and this is the aspect of teshuvah on the teshuvah of the most of the people, until their teshuvah was completed in its fullness. And on Shabbat the mannah would not fall at all, we then eat the double portion of the sixth day, which is the secret of "oneg shabbat" (enjoying Shabbat). Because then there is no clarification, we do not exert effort in the continuation of the Flow into physicality according to the clarification - then we only have to eat the Shabbat meal to enjoy [the presence of] Hashem through the double portion, which is the aspect of teshuvah on the teshuvah of the great Tzadikim, which are the aspect of Moshe, who is himself the aspect of Mannah, the aspect of Awareness, because all one's teshuvah is on understanding the past, as explained. On Shabbat there is no clarification, and the essence of reaching the worlds above is on Shabbat, as brought in the kavanot [intentions]. And the First Human, while they had no Impulse to Selfishness [yetzer hara] had no need for clarifications, they only needed to go up the higher worlds, as explained in many kavanot regarding this. and this is the essence of the holiness of Shabbat, which the great Tzadikim merit, which is the aspect of teshuvah on teshuvah, in completeness, in truth, as explained, since according to one's teshuvah is one's ascent to the upper worlds that are connected to one. Therefore, in truth, the essence of double portion [lechem mishneh] is the aspect of the repetition of the Torah [mishneh Torah] which is merited by the true tzadikim as explained. And we, too, are obligated to the double portion in remembrance of the mannah, as we continue the aspect of double portion, the aspect of teshuvah, according to our worth, through the strength of the great tzadikimwho merit the double portion, the aspect of teshuvah, in every time on the understanding of the past, as we explained. It was already explained above that through those tzadikim, who are the essence of holiness of Shabbat, which is the essence of teshuvah of the World to Come, which is all understanding, as explained, it is through those tzadikim that any person can merit tesuhvah, even the worst of the worst. This is because every time those tzadikim do teshuvah on their first understanding, and come to a deeper understanding, through that they reach greater chesed/lovingkindness, and through this they raise the fallen and introduce into them the aspect of depth, so they [see that] have merited at this moment to be "if I descend to Sheol, You are there too" (Psalms 139:8) and that also in their place they have drawn themselves to the Blessed Holy One in everything that happened to them, and they have screamed and prayed to the Holy Blessed One with all the desire of their souls, in the aspect of "from the belly of Sheol I called" (Jonah 2:3), in the aspect of "Waters flowed over my head; I said: I am lost! I have called on Your name, O Ad-nai, from the depths of the Pit... until Ad-nai looks down and beholds from heaven (Lamentations 3:50-56, note inverted order) - so they will merit complete teshuvah, as explained above. And all this is in the aspect of the holiness of Shabbat, that is received by every one of the the great tzadikim as explained, because they are the aspect of Moshe, the aspect of Shabbat, which is all the days, and it is as explained.