HOLINESS The essence of the holiness which every person must strive for is to observe the Covenant in purity. The way to achieve this is by sanctifying the way you speak. You must speak only words of holiness and keep yourself from any lapse into language which is not holy. Then whatever you say will be in “the Holy Tongue,” and through this you will achieve the holiness of the Covenant (19).
קְדֻשָּׁה וּבוֹ נִכְלָל קִדּוּשׁ הַשֵּׁם
א. עִקַּר הַקְּדֻשָּׁה הוּא קְדֻשַּׁת הַבְּרִית, וְזֶה זוֹכִין עַל־יְדֵי קְדֻשַּׁת הַלָּשׁוֹן וְהַדִּבּוּר, שֶׁמְּקַדְּשִׁין אוֹתוֹ בְּדִבּוּרִים קְדוֹשִׁים וְשׁוֹמְרִים עַצְמָן מִכֹּל מִינֵי פְּגַם הַדִּבּוּר, עַד שֶׁזּוֹכִין שֶׁיִּהְיֶה דִּבּוּרוֹ וּלְשׁוֹנוֹ בִּבְחִינַת שְׁלֵמוּת לְשׁוֹן הַקֹּדֶשׁ, וְעַל־יְדֵי זֶה זוֹכִין לִקְדֻשַּׁת הַבְּרִית: (לק"א סי' י"ט אות ג')
HOLINESS
The essence of the holiness which every person must strive for is to observe the Covenant in purity. The way to achieve this is by sanctifying the way you speak. You must speak only words of holiness and keep yourself from any lapse into language which is not holy. Then whatever you say will be in “the Holy Tongue,” and through this you will achieve the holiness of the Covenant (19).