Deuteronomy 30:20

20 to love the Lord thy God, to hearken to his voice, and cleave to him; for this thy life, and the length of thy days, that thou shouldest dwell upon the land, which the Lord sware to thy fathers, Abraam, and Isaac, and Jacob, to give to 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 declare to you this day, that ye shall utterly perish, and ye shall by no means live long upon the land, into which ye go over Jordan to inherit it.

19 I call both heaven and earth to witness this day against you, I have set before you life and death, the blessing and the curse: choose thou life, that thou and thy seed may live;

20 to love the Lord thy God, to hearken to his voice, and cleave to him; for this thy life, and the length of thy days, that thou shouldest dwell upon the land, which the Lord sware to thy fathers, Abraam, and Isaac, and Jacob, to give to them.