Deuteronomy 30:20

20 to love Jehovah thy God, to obey his voice, and to cleave unto him; for he is thy life, and the length of thy days; that thou mayest dwell in the land which Jehovah sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to 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 denounce unto you this day, that ye shall surely perish; ye shall not prolong your days in the land, whither thou passest over the Jordan to go in to possess it.

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

20 to love Jehovah thy God, to obey his voice, and to cleave unto him; for he is thy life, and the length of thy days; that thou mayest dwell in the land which Jehovah sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.