His heart burned, his heart burned within him
He was filled with intense emotion, was full of desire or enthusiasm.
(And this one whose heart burns within him and desires to learn, but it is impossible for him, he receives a heart, from the heart above... whose heart was burning for the land of Israel... and every person must ask from the Blessed Name that he have storms and longings for the land of Israel - Rabbi Nachman of Breslov / Likutei Moharan, Torah 155, and also: For he already desired her when he saw her in his father's house and since then gave his mind upon her, and this was burning in his heart like glowing fire to reign immediately and take her as a wife - Malbim Kings 1)
Translation
Expression (Hebrew)
בָּעַר לִבּוֹ, לִבּוֹ בָּעַר בְּקִרְבּוֹ
Definition (Hebrew)
הִתְמַלֵּא בְּרֶגֶשׁ עַז. הָיָה מָלֵא בִּתְשׁוּקָה אוֹ הִתְלַהֲבוּת.
("וְזֶה שֶׁלִּבּוֹ בּוֹעֵר בְּקִרְבּוֹ וְחוֹשֵׁק לִלְמֹד, רַק שֶׁאִי אֶפְשָׁר לוֹ, הוּא מְקַבֵּל לֵב, מִלֵּב שֶׁלְּמַעְלָה...שֶׁהָיָה לִבּוֹ בּוֹעֵר לְאֶרֶץ יִשְׂרָאֵל...וְצָרִיךְ כָּל אָדָם לְבַקֵּשׁ מֵהַשֵּׁם יִתְבָּרַךְ שֶׁיִּהְיֶה לוֹ כִּסּוּפִין וְגַעְגּוּעִים לְאֶרֶץ יִשְׂרָאֵל"- ר' נַחְמָן מִבְּרֶסְלָב/ לִקּוּטֵי מוהר"ן, תּוֹרָה קנ"ה, וְכֵן:"כִּי כְּבָר חֵשֶׁק בָּהּ מִכְּבָר בָּעֵת רָאָה אוֹתָהּ בְּבֵית אָבִיו וּמֵאָז נָתַן דַּעְתּוֹ עָלֶיהָ, וְזֹאת בָּעֲרָה בְּלִבּוֹ כְּרֶשֶׁף אֵשׁ לִמְלֹךְ תֵּכֶף וּלְקַחְתָּהּ לוֹ לְאִשָּׁה"- מַלְבִּי"ם מְלָכִים א פֶּרֶק א)