Deuteronomy 6:2

2 that thou dread thy Lord God, and keep all his commandments, and behests, which I command to thee, and to thy sons, and to the sons of thy sons, in all the days of thy life, that thy days be lengthened. (that thou fear the Lord thy God/that thou revere the Lord thy God, and obey all his commandments, and statutes, which I command to thee, and to thy sons and daughters, and to thy children's children, in all the days of thy life, so that thy days be lengthened.)

Deuteronomy 6:2 Meaning and Commentary

Deuteronomy 6:2

That thou mightest fear the Lord thy God
Being taught to know the greatness of his being, and the nature of his mind and will, and the manner of his worship; and not with a slavish fear, but with a filial one, a reverential affection for God; being instructed in their duty, as of children, to their God and Father; see ( Deuteronomy 5:29 )

to keep all his statutes, and his commandments, which I command thee;
not in his own name, but in the name, and by the authority of God, whose minister and messenger he was; and all, having the stamp of divine authority on them, were to be observed and kept, and not one to be neglected or departed from:

thou, and thy son, and thy son's son, all the days of thy life;
a man and his children, and grandchildren; he was to take care that they kept all the commandments of the Lord as long as he lived, and had any concern with them:

and that thy days may be prolonged;
long life being reckoned a very great outward mercy; a long enjoyment of, and continuance in the land of Canaan, is chiefly designed, which is usually expressed when this is observed; see ( Deuteronomy 4:26 Deuteronomy 4:40 ) ( Deuteronomy 5:16 Deuteronomy 5:33 ) .

Deuteronomy 6:2 In-Context

1 These be the commandments, ceremonies, and dooms, which your Lord God commanded that I should teach you, and that ye do them in the land to which ye pass over to wield; (These be the commandments, and statutes, and laws, or judgements, which the Lord your God commanded that I should teach you, so that ye would do them in the land to which ye shall cross over to take;)

2 that thou dread thy Lord God, and keep all his commandments, and behests, which I command to thee, and to thy sons, and to the sons of thy sons, in all the days of thy life, that thy days be lengthened. (that thou fear the Lord thy God/that thou revere the Lord thy God, and obey all his commandments, and statutes, which I command to thee, and to thy sons and daughters, and to thy children's children, in all the days of thy life, so that thy days be lengthened.)

3 Thou Israel, hear, and keep, that thou do those things which the Lord commanded to thee, and that it be well to thee, and thou be multiplied more, as the Lord God of thy fathers hath promised, to give to thee a land flowing with milk and honey. (Hear, O Israel, and obey, that thou do those things which the Lord commanded thee, and that it be well with thee, and thou be greatly multiplied in the land flowing with milk and honey, as the Lord God of thy fathers promised thee.)

4 Thou Israel, hear, thy Lord God is one God. (Hear, O Israel, the Lord thy God is one God.)

5 Thou shalt love thy Lord God of all thine heart, and of all thy soul, and of all thy strength. (Thou shalt love the Lord thy God with all thy heart, and with all thy soul, and with all thy strength.)