You shall be holy etc - Holiness is an expression of separation and an expression of belonging and invitation, that is, the Holy One of Blessing warns Israel that they will be separated from all things that carry idolatry, and are invited and belong to the service to the Blessed One.
קְדֹשִׁים תִּהְיוּ וְגוֹ'. קְדֻשָּׁה הוּא לְשׁוֹן הֶבְדֵּל וּלְשׁוֹן שַׁיָּכוּת וְזִימּוּן, הַיְינוּ כִּי הַשי"ת יַזְהִיר לְיִשְׂרָאֵל שֶׁיִּהְיוּ מֻבְדָּלִים מִכָּל דִּבְרֵי הָעוֹלָם הַזֶּה וְיִהְיוּ מְזֻמָּנִים וְשַׁיָּכִים לַעֲבוֹדָתוֹ יִתְבָּרַךְ.
You shall be holy etc - Holiness is an expression of separation and an expression of belonging and invitation, that is, the Holy One of Blessing warns Israel that they will be separated from all things that carry idolatry, and are invited and belong to the service to the Blessed One.