The Kuzari treats Jewish history as a providential process, with exile serving a larger national and spiritual purpose leading to redemption.
(כד) אָמַר הֶחָבֵר: הוֹבַשְׁתַּנִי מֶלֶךְ כּוּזָר, וְהֶעָוֹן הַזֶּה הוּא אֲשֶׁר מְנָעָנוּ מֵהַשְׁלָמַת מַה שֶּׁיְּעָדָנוּ בוֹ הָאֱלֹהִים בְּבַיִת שֵׁנִי, כְּמָה שֶׁאָמַר: "רָנִּי וְשִׂמְחִי בַּת־צִיּוֹן", כִּי כְבָר הָיָה הָעִנְיָן הָאֱלֹהִי מְזֻמָּן לָחוּל כַּאֲשֶׁר בַּתְּחִלָּה אִלּוּ הָיוּ מַסְכִּימִים כֻּלָּם לָשׁוּב בְּנֶפֶשׁ חֲפֵצָה, אֲבָל שָׁבוּ מִקְצָתָם וְנִשְׁאֲרוּ רֻבָּם וּגְדוֹלֵיהֶם בְּבָבֶל, רוֹצִים בַּגָּלוּת וּבָעֲבוֹדָה – שֶׁלֹּא יִפָּרְדוּ מִמִּשְׁכְּנוֹתֵיהֶם וְעִנְיָנֵיהֶם. וְשֶׁמָּא עַל זֶה אָמַר שְׁלֹמֹה: "אֲנִי יְשֵׁנָה וְלִבִּי עֵר", כִּנָּה הַגָּלוּת בְּשֵׁנָה וְהַלֵּב הָעֵר הַתְמָדַת הַנְּבוּאָה בֵינֵיהֶם. "קוֹל דּוֹדִי דוֹפֵק", קְרִיאַת הָאֱלֹהִים לָשׁוּב. "שֶׁרֹאשִׁי נִמְלָא־טָל" עַל הַשְּׁכִינָה שֶׁיָּצְאָה מִצִּלְלֵי הַמִּקְדָּשׁ, וּמַה שֶּׁאָמַר: "פָּשַׁטְתִּי אֶת כֻּתָּנְתִּי", עַל עַצְלוּתָם לָשׁוּב. "דּוֹדִי שָׁלַח יָדוֹ מִן־הַחוֹר", עַל עֶזְרָא שֶׁהָיָה פוֹצֵר בָּהֶם וּנְחֶמְיָה וְהַנְּבִיאִים, עַד שֶׁהוֹדוּ קְצָתָם לָשׁוּב הוֹדָאָה בִלְתִּי גְמוּרָה, וְנָתַן לָהֶם כְּמַצְפּוּן לִבָּם, וּבָאוּ הָעִנְיָנִים מְקֻצָּרִים מִפְּנֵי קִצּוּרָם, כִּי הָעִנְיָן הָאֱלֹהִי אֵינֶנּוּ חָל עַל הָאִישׁ אֶלָּא כְּפִי הִזְדַּמְּנוּתוֹ לוֹ, אִם מְעַט – מְעָט וְאִם הַרְבֵּה – הַרְבֵּה. וְאִלּוּ הָיִינוּ מִזְדַּמְּנִים לִקְרַאת אֱלֹהֵי אֲבוֹתֵינוּ בְּלֵבָב שָׁלֵם וּבְנֶפֶשׁ חֲפֵצָה, הָיִינוּ פוֹגְעִים מִמֶּנּוּ מַה שֶּׁפָּגְעוּ אֲבוֹתֵינוּ בְּמִצְרָיִם. וְאֵין דִּבּוּרֵנוּ: "הִשְׁתַּחֲווּ לְהַר קָדְשׁוֹ", וְ"הִשְׁתַּחֲווּ לְהֲדוֹם רַגְלָיו", וְ"הַמַּחֲזִיר שְׁכִינָתוֹ לְצִיּוֹן", וְזוּלַת זֶה, אֶלָּא כְצִפְצוּף הַזַּרְזִיר, שֶׁאֵין אֲנַחְנוּ חוֹשְׁבִים עַל מַה שֶּׁנֹאמַר בָּזֶה וְזוּלָתוֹ, כַּאֲשֶׁר אָמַרְתָּ מֶלֶךְ כּוּזָר.
24. The Rabbi: This is a severe reproach, O king of the Khazars. It is the sin which kept the divine promise with regard to the second Temple, viz.: Sing and rejoice, O daughter of Zion' (Zachariah 2:14), from being fulfilled. Divine Providence was ready to restore everything as it had been at first, if they had all willingly consented to return. But only a part was ready to do so, whilst the majority and the aristocracy remained in Babylon, preferring dependence and slavery, and unwilling to leave their houses and their affairs. An allusion to them might be found in the enigmatic words of Solomon: I sleep, but my heart waketh (Song of Songs 5:2-4). He designates the exile by sleep, and the continuance of prophecy among them by the wakefulness of the heart. 'It is the voice of my beloved that knocketh' means God's call to return; 'My head is filled with dew' alludes to the Shekhinah which emerged from the shadow of the Temple. The words: 'I have put off my coat,' refer to the people's slothfulness in consenting to return. The sentence: 'My beloved stretcheth forth his hand through the opening' may be interpreted as the urgent call of Ezra, Nehemiah, and the Prophets, until a portion of the people grudgingly responded to their invitation. In accordance with their mean mind they did not receive full measure. Divine Providence only gives man as much as he is prepared to receive; if his receptive capacity be small, he obtains little, and much if it be great. Were we prepared to meet the God of our forefathers with a pure mind, we should find the same salvation as our fathers did in Egypt. If we say: 'Worship his holy hill--worship at His footstool--He who restoreth His glory to Zion' (Psalms 99:9, Psalsm 99:5), and other words, this is but as the chattering of the starling and the nightingale. We do not realise what we say by this sentence, nor others, as thou rightly observest, O Prince of the Khazars.