The skull
Rabbi Shimon describes the skull of Arich Anpin in which are 130 million worlds, and he describes the flow of dew to Zeir Anpin and by which the dead wake up in the World to Come. He talks about that dew that sustains the Supreme Holy Ones and about the manna that sustains the righteous in the future. We learn how the whiteness of this skull radiates light in thirteen directions and how the dew flows to Zeir Anpin. The white illumination for the rest of the lower skulls (the crowns in the grades of the three worlds Briyah, Yetzirah and Asiyah) is drawn from the skull of Zeir Anpin.
Membrane of air and the concealed brain
We learn about the membrane that covers the brain that is the concealed Chochmah of Arich Anpin. The brains of Zeir Anpin spread out to 32 paths because the membrane is detached from Him
Pure wool
Rabbi Shimon talks about the thousands of groups of hairs in the skull of the head, every strand of which glows in 410 worlds. A well spring glows and flows from these strands to the strands of Zeir Anpin, and the brain of Zeir Anpin gets constructed from these, after which it flows to the 32 paths of wisdom. Rabbi Shimon says that a person's character is revealed from his hair. From the parting of the hair Rabbi Shimon deduces a parting into 613 ways of the Torah, meaning the 613 precepts.
Idra Raba: Verse 16
בְּגוּלְגַּלְתָּא, יַתְבִין תְּלֵיסַר אַלְפֵי רִבּוֹא עָלְמִין, דְּנַטְלִין עֲלוֹי רַגְלִין, וְסַמְכִין עֲלוֹי. וּמֵהַאי גּוּלְגַּלְתָּא נָטִיף טַלָּא, לְהַהוּא דִּלְבַר, וּמַלְיָיא לְרֵישֵׁיהּ בְּכָל יוֹמָא, דִּכְתִּיב שֶׁרֹאשִׁי נִמְלָא טָל.
In the skull, WHICH IS KETER OF ARICH ANPIN, reside 13,000 x 10,000 (130 million) worlds that move on feet and are supported by them. From this skull, dew drops flow DAILY to the exterior one, ZEIR ANPIN, and fill the head every single day, as it is written: "For my head is filled with dew" (Shir Hashirim 5:2).
Idra Raba: Verse 17
וּמֵהַהוּא טַלָּא דְּאַנְעַר מֵרֵישֵׁיהּ, הַהוּא דְּאִיהוּ לְבַר, יִתְּעֲרוּן מֵתַיָּיא לְעָלְמָא דְּאָתֵי. דִּכְתִיב כִּי טַל אוֹרוֹת טַלֶּךָ, אוֹרוֹת נְהוֹרָא דְּחִוַורְתָּא דְּעַתִּיקָא. וּמֵהַהוּא טַלָּא, מִתְקַיְּימִין קַדִּישֵׁי עֶלְיוֹנִין. וְהוּא מָנָא דְּטַחְנֵי לְצַדִּיקַיָּיא לְעָלְמָא דְּאָתֵי. וְנָטִיף הַהוּא טַלָּא לְחַקְלָא דְּתַפּוּחִין קַדִּישִׁין. הה"ד, וַתַּעַל שִׁכְבַת הַטָּל וְהִנֵּה עַל פְּנֵי הַמִּדְבָּר דַּק מְחוּסְפָּס. וְחֵיזוּ הַהוּא טַלָּא חִוָּור. כְּהַאי גַּוְונָא דְּאַבְנִין דִּבְדּוֹלְחָא, דְּאִתְחַזְיָיא כָּל גַּוְונִין בְּגַוָּוהּ. הה"ד וְעֵינוֹ כְּעֵין הַבְּדוֹלַח.
From that dew, which is outside, and which ZEIR ANPIN shakes off from his head, the dead wake up TO LIFE in the World to Come, as it is written: "For your dew is as the dew on herbs (also: 'of lights')" (Yeshayah 26:19). THIS IS BECAUSE THIS DEW IS the illumination of the white light of Atika, MEANING THE WHITENESS OF THE SKULL THAT IS NAMED ATIKA, and from that dew the supreme holy beings are sustained. That is the manna that is ground for the righteous in the World to Come. That dew flows to the field of holy apple trees, THE MALCHUT, as it says, "And when the layer of dew was gone up, behold, upon the face of the wilderness there lay a fine flaky substance" (Shemot 16:14). The appearance of that dew is white like the crystal stones that appear to contain all the colors within them, as it is written: "And its color was like the color of crystal" (Bemidbar 11:7).
