שָׁמ֣וֹר תִּשְׁמְר֔וּן אֶת־מִצְוֺ֖ת יְהוָ֣ה אֱלֹהֵיכֶ֑ם וְעֵדֹתָ֥יו וְחֻקָּ֖יו אֲשֶׁ֥ר צִוָּֽךְ׃
Ye shall diligently keep the commandments of the LORD your God, and His testimonies, and His statutes, which He hath commanded thee.
Read kabbalistic (mystical) interpretation of Deuteronomy 6:17: and classical mystical sources.