Wholeheartedly / with all one's heart / with all his soul and with all his might
Sincerely. Faithfully. With strong will.
(“You shall love the Lord your God with all your heart, with all your soul, and with all your might” – Deuteronomy 6:5; and: “If you have a person whose body is dearer to him than his wealth, it is said: 'with all your soul'; and if a person values his wealth more than his body, it is said: 'with all your might' … 'with all your heart' – in both inclinations, the good inclination and the evil inclination” – Tractate Berakhot 61b; and: “And he built this monument for his name and honor / Daniel, dark and grieving over his only son / whom he loved with all his heart, with all his soul, and with all his might” – Emmanuel HaRomi (13th century) / HaYerusha)
Translation
Expression (Hebrew)
בְּכָל לֵב, בְּכָל לִבּוֹ וּבְכָל מְאוֹדוֹ, בְּכָל נַפְשׁוֹ וּבְכָל מְאוֹדוֹ
Definition (Hebrew)
בְּכֵנוּת. בְּנֶאֱמָנוּת. בְּרָצוֹן חָזָק.
("וְאָהַבְתָּ אֶת ה' אֱלֹהֶיךָ בְּכָל לְבָבְךָ וּבְכָל נַפְשְׁךָ וּבְכָל מְאֹדֶךָ"- דְּבָרִים ו ה, וְכֵן: "אִם יֵשׁ לְךָ אָדָם שֶׁגּוּפוֹ חָבִיב עָלָיו מִמָּמוֹנוֹ, לְכָךְ נֶאֱמַר: "בְּכָל נַפְשְׁךָ", וְאִם יֵשׁ לָךְ אָדָם שֶׁמָּמוֹנוֹ חָבִיב עָלָיו מִגּוּפוֹ, לְכָךְ נֶאֱמַר: "בְּכָל מְאוֹדְךָ" ... "בְּכָל לְבָבֶךָ"- בִּשְׁנֵי יַצְרִיךְ, בַּיֵּצֶר הַטּוֹב וּבִצֵּר הָרַע"- מַסֶּכֶת בְּרָכוֹת סא ע"ב, וְכֵן: "וּבָנָה זֶה הַצִּיּוּן לִשְׁמוֹ וְלִכְבוֹדוֹ/ דָּנִיֵּאל הַקּוֹדֵר וְהַנִּכְאָב בְּנוֹ יְחִדּוֹ/ אֲשֶׁר אָהֲבוּ בְּכָל לְבָבוֹ וּבְכָל נַפְשׁוֹ וּבְכָל מְאֹדוֹ"- עִמָּנוּאֵל הָרוֹמִי (הַמֵּאָה הי"ג)/ הַיְּרֻשָּׁה)