Le Deutéronome 11:1 Commentaire : Ramban, Tur HaArokh, Ibn Ezra & Rav Hirsch

וְאָ֣הַבְתָּ֔ אֵ֖ת יְהוָ֣ה אֱלֹהֶ֑יךָ וְשָׁמַרְתָּ֣ מִשְׁמַרְתּ֗וֹ וְחֻקֹּתָ֧יו וּמִשְׁפָּטָ֛יו וּמִצְוֺתָ֖יו כָּל־הַיָּמִֽים׃

Tu aimeras donc l’Éternel, ton Dieu, et tu observeras ses lois, ses statuts, ses préceptes, en tous temps.

Ramban

AND THOU SHALT KEEP HIS CHARGE — to fear Him, that you be heedful of sinning against Him. For after enjoining them concerning the love of G-d,272At the beginning of this verse: And thou shalt love the Eternal thy G-d. He commands them concerning fear [of Him] and He enjoins the observance of the statutes, ordinances, and commandments. Or it may be that the expression and thou shalt keep His charge means that you are to protect what G-d protects, for He preserveth the strangers,273Psalms 146:9. is gracious unto the poor274Proverbs 19:17. and the destitute, and He doth execute justice for the fatherless and the widow.275Above, 10:18. As it is said elsewhere, to keep the charge of the Eternal thy G-d, to walk in His ways,276I Kings 2:3. and the Rabbis have said:277Shabbath 133b. “Just as He is gracious and merciful,278Exodus 34:6. so you also be gracious and merciful, etc.”

Tur HaArokh

ושמרת משמרתו, “you shall keep His charge.” Nachmanides understands these words to mean that we must maintain an attitude of reverence and fear even, which will ensure that we will not sin. Having previously commanded us to love Him (G’d), Moses now commands us to fear Him, as familiarity of the beloved might cause the beloved to sin inadvertently. This fear/reverence relationship covers all the various types of commandments in the Torah. Alternatively, this may be a command by Moses to emulate G’d in our relationship with creatures of whom G’d has demonstrated that He is especially solicitous. He declared His concern for the poor, the orphan and the widow, so we must relate to them with equal concern. He practices the virtues of being merciful; hence we, His creatures, must learn to practice that same virtue.

Ibn Ezra

Since He has multipled you, you are bound to love Him (which has been said before, but here Scripture adds always).