490. "In sorrow you shall bring forth children" is explained THAT SORROW IS THE INNER MEANING OF THE SERPENT. And if you say, why do we need this serpent. HE ANSWERS: he opened a way through which the souls descend into the world, and but for that opening through which the souls can descend, no SOULS would dwell inside man. It is written: "sin crouches at the door" (Beresheet 4:7). What is this door? It is the door OF MALCHUT, which purpose is to give birth, to deliver souls into the world. He, THE SERPENT, stands at the door.
490. בְּעֶצֶב תֵּלְדִי בָּנִים, כְּמָה דְּאוֹקִימְנָא. וְאִי תֵּימָא אֲמַאי אִצְטְרִיךְ חִוְיָא לְדָא. אֶלָּא דָּא פָּתַח אוֹרְחָא לְנַחְתָּא כָּל אִינּוּן נִשְׁמָתִין דְּעָלְמָא. דְּאִלְמָלֵא לָא פָּתַח אוֹרְחִין לְנַחְתָּא לְתַתָּא, לָא יִשְׁרֵי בְּגַוֵיהּ דְּבַר נָשׁ, מַה כְּתִיב לַפֶּתַח חַטָּאת רֹבֵץ. מַאי לַפֶּתַח. לְהַהוּא פֶּתַח דְּאִתְעַתְּדָא לְאוֹלָדָא, לְאַפָּקָא נִשְׁמָתִין לְעָלְמָא, אִיהוּ קָאֵים לְגַבֵּי הַהוּא פֶּתַח.