תניא, חלק ראשון; ליקוטי אמרים ל״ב — ד"ה כִּי מֵאַחַר שֶׁגּוּפוֹ נִמְאָס וּמְתוֹעָב אֶצְלוֹ
This chapter grounds love of fellow Jews in seeing the other's soul and avoiding humiliation. That spiritual ethic is highly relevant to the Tu B'Av borrowed garments, where the point is to prevent shame and equalize dignity.
כִּי מֵאַחַר שֶׁגּוּפוֹ נִמְאָס וּמְתוֹעָב אֶצְלוֹ, וְהַנֶּפֶשׁ וְהָרוּחַ מִי יוֹדֵעַ גְּדוּלָּתָן וּמַעֲלָתָן בְּשָׁרְשָׁן וּמְקוֹרָן בֵּאלֹקִים חַיִּים. בְּשֶׁגַּם שֶׁכּוּלָּן מַתְאִימוֹת, וְאָב אֶחָד לְכוּלָּנָה, וְלָכֵן נִקְרְאוּ כָּל יִשְׂרָאֵל ״אַחִים״ מַמָּשׁ, מִצַּד שׁוֹרֶשׁ נַפְשָׁם בַּה׳ אֶחָד רַק שֶׁהַגּוּפִים מְחוּלָּקִים. וְלָכֵן, הָעוֹשִׂים גּוּפָם עִיקָּר וְנַפְשָׁם טְפֵלָה – אִי אֶפְשָׁר לִהְיוֹת אַהֲבָה וְאַחֲוָה אֲמִיתִּית בֵּינֵיהֶם, אֶלָּא הַתְּלוּיָה בְדָבָר לְבַדָּהּ. וְזֶהוּ שֶׁאָמַר הִלֵּל הַזָּקֵן עַל קִיּוּם מִצְוָה זוֹ: ״זֶהוּ כָּל הַתּוֹרָה כוּלָּהּ, וְאִידָךְ פֵּירוּשָׁא הוּא כוּ׳״. כִּי יְסוֹד וְשׁוֹרֶשׁ כָּל הַתּוֹרָה – הוּא לְהַגְבִּיהַּ וּלְהַעֲלוֹת הַנֶּפֶשׁ עַל הַגּוּף מַעְלָה מַּעְלָה עַד עִיקָּרָא וְשָׁרְשָׁא דְּכָל עָלְמִין וְגַם, לְהַמְשִׁיךְ אוֹר־אֵין־סוֹף בָּרוּךְ־הוּא בִּכְנֶסֶת יִשְׂרָאֵל, כְּמוֹ שֶׁיִּתְבָּאֵר לְקַמָּן, דְּהַיְינוּ, בִּמְקוֹר נִשְׁמוֹת כָּל יִשְׂרָאֵל, לְמֶהֱוֵי אֶחָד בְּאֶחָד דַּוְקָא, וְלֹא כְּשֶׁיֵּשׁ פֵּירוּד חַס וְשָׁלוֹם בַּנְּשָׁמוֹת, דְּ״קוּדְשָׁא־בְּרִיךְ־הוּא לָא שַׁרְיָא בַּאֲתַר פְּגִים״, וּכְמוֹ שֶׁאוֹמְרִים: ״בָּרְכֵנוּ אָבִינוּ כּוּלָּנוּ כְּאֶחָד בְּאוֹר פָּנֶיךָ״, וּכְמוֹ שֶׁנִּתְבָּאֵר בְּמָקוֹם אַחֵר בַּאֲרִיכוּת:
For, whereas one despises and loathes one’s body, while as for the soul and spirit, who can know their greatness and excellence in their root and source in the living G–d? Being, moreover, all of a kind and all having one Father—therefore, all Israelites are called real brothers by virtue of the source of their souls in the One G–d; only the bodies are separated. Hence in the case of those who give major consideration to their bodies while regarding their souls as of secondary importance, there can be no true love and brotherhood among them, but only [a love] which is dependent on a [transitory] thing. This is what Hillel the Elder meant when he said in regard to the fulfillment of this commandment, “This is the whole Torah, while the rest is but commentary,” and so on. For the basis and root of the entire Torah are to raise and exalt the soul high above the body, reaching to the Source and Root of all the worlds, and also to bring down the Light of the En Sof, blessed is He, upon the community of Israel, as will be explained later, i.e., into the fountainhead of the souls of all Israel, to become “One into One.” This is impossible if there is, G–d forbid, disunity among the souls, for the Holy One, blessed is He, does not dwell in an imperfect place, as we pray, “Bless us, our Father, all of us as one, with the light of Your Countenance,” as has been explained at great length elsewhere.