The Talmud states that since the destruction of the Temple, God has nothing in the world except for the four cubits of halacha. Torah study — particularly the study of law — becomes the primary way to encounter the Divine presence.
אֲמַר לֵיהּ, הָכִי אָמַר רַב חִסְדָּא: מַאי דִּכְתִיב, ״אֹהֵב ה׳ שַׁעֲרֵי צִיּוֹן מִכֹּל מִשְׁכְּנוֹת יַעֲקֹב״: אוֹהֵב ה׳ שְׁעָרִים הַמְצוּיָּינִים בַּהֲלָכָה, יוֹתֵר מִבָּתֵּי כְנֵסִיּוֹת וּמִבָּתֵּי מִדְרָשׁוֹת. וְהַיְינוּ דְּאָמַר רַבִּי חִיָּיא בַּר אַמֵּי מִשְּׁמֵיהּ דְּעוּלָּא: מִיּוֹם שֶׁחָרַב בֵּית הַמִּקְדָּשׁ אֵין לוֹ לְהַקָּדוֹשׁ בָּרוּךְ הוּא בְּעוֹלָמוֹ אֶלָּא אַרְבַּע אַמּוֹת שֶׁל הֲלָכָה בִּלְבַד. וְאָמַר אַבָּיֵי: מֵרֵישׁ הֲוָה גָּרֵיסְנָא בְּגוֹ בֵּיתָא וּמְצַלֵּינָא בְּבֵי כְנִישְׁתָּא. כֵּיוָן דִּשְׁמַעְנָא לְהָא דְּאָמַר רַבִּי חִיָּיא בַּר אַמֵּי מִשְּׁמֵיהּ דְּעוּלָּא — מִיּוֹם שֶׁחָרַב בֵּית הַמִּקְדָּשׁ אֵין לוֹ לְהַקָּדוֹשׁ בָּרוּךְ הוּא בְּעוֹלָמוֹ אֶלָּא אַרְבַּע אַמּוֹת שֶׁל הֲלָכָה בִּלְבַד — לָא הֲוָה מְצַלֵּינָא אֶלָּא הֵיכָא דְּגָרֵיסְנָא.
Rafram said to him, Rav Ḥisda said as follows: What is the meaning of the verse: “The Lord loves the gates of Zion [Tziyyon] more than all the dwellings of Jacob” (Psalms 87:2)? This means that the Lord loves the gates distinguished [metzuyanim] through the study of halakha as they are the gates of Zion, the outstanding gates, more than the synagogues and study halls. Although those places are the most outstanding of the dwellings of Jacob, they are not engaged in the study of halakha. And this concept, that halakha is the most sublime pursuit, is expressed in that which Rabbi Ḥiyya bar Ami said in the name of Ulla: Since the day the Temple, where the Divine Presence rested in this world, was destroyed, the Holy One, Blessed be He, has only one place in His world where he reveals His presence exclusively; only the four cubits where the study of halakha is undertaken. This statement has practical ramifications. Abaye said: At first I studied in the house and prayed in the synagogue. Once I heard what Rabbi Ḥiyya bar Ami said in the name of Ulla: Since the day the Temple was destroyed, the Holy One, Blessed be He, has only one place in His world, only the four cubits of halakha alone, from which I understood the significance of the four cubits of halakha, and I pray only where I study.