Deuteronomy 30:20

20 and that thou love thy Lord God, and obey to his voice, and cleave to him, for he is thy life, and the length of thy days; that thou dwell in the land, for which the Lord swore to thy fathers, Abraham, Isaac, and Jacob, that he should give it to them. (and that thou love the Lord thy God, and obey his voice, and cleave to him, for he is thy life, and the length of thy days; and so that thou can live in the land which the Lord swore to thy fathers, Abraham, Isaac, and Jacob, that he would give them.)

Deuteronomy 30:20 Meaning and Commentary

Deuteronomy 30:20

That thou mayest love the Lord thy God
And show it by keeping his commands:

[and] that thou mayest obey his voice;
in his word, and by his prophets:

and that thou mayest cleave unto him;
and to his worship, and not follow after and serve other gods:

for he [is] thy life, and the length of thy days;
the God of their lives, and the Father of their mercies; the giver of long life, and all the blessings of it; and which he had promised to those that were obedient, to him, and which they might expect:

that thou mayest dwell in the land which the Lord sware unto thy
fathers, to Abraham, to Isaac, and to Jacob, to give them;
the land of Canaan, often thus described; this was the grand promise made to obedience to the law, and was typical of eternal life and happiness; which is had, not through man's obedience to the law, but through the obedience and righteousness of Christ.

Deuteronomy 30:20 In-Context

18 I before-say to thee today, that thou shalt perish, and thou shalt dwell little time in the land, to which thou shalt enter to wield, when thou shalt pass (the) Jordan. (I say to thee today, before the time, or ahead of time, that thou shalt die, and thou shalt live only a short time in the land, which thou shalt enter to take, when thou shalt cross over the Jordan River.)

19 I call today heaven and earth to witness, that is, angels and men, that I have set forth to you life and death, good and evil, blessing and cursing; therefore choose thou life, that both thou live and thy seed, (I call heaven and earth, that is, the angels and men, to witness today, that I have set forth before you life and death, good and evil, blessing and curses; and so choose thou life, so that both thou and thy descendants shall live,)

20 and that thou love thy Lord God, and obey to his voice, and cleave to him, for he is thy life, and the length of thy days; that thou dwell in the land, for which the Lord swore to thy fathers, Abraham, Isaac, and Jacob, that he should give it to them. (and that thou love the Lord thy God, and obey his voice, and cleave to him, for he is thy life, and the length of thy days; and so that thou can live in the land which the Lord swore to thy fathers, Abraham, Isaac, and Jacob, that he would give them.)