Deuteronomy 30:20

20 in that thou louest the Lorde thi God herkenest vnto his voyce and cleauest vnto him. For he is thi life and the lengthe of thi dayes, that thou mayst dwell vppon the erth which the Lorde sware vnto thi fathers: Abraham, Isaac and Iacob to geue 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 pronounce vnto you this daye, that ye shal surely peresh and that ye shall not prolonge youre dayes vppon the londe whother thou passest ouer Iordayne to goo and possesse it.

19 I call to recorde this daye vnto you, heauen and erth, that I haue sett before you lyfe and deeth, blessynge and cursynge: but chose lyfe, that thou and thi seed maye lyue,

20 in that thou louest the Lorde thi God herkenest vnto his voyce and cleauest vnto him. For he is thi life and the lengthe of thi dayes, that thou mayst dwell vppon the erth which the Lorde sware vnto thi fathers: Abraham, Isaac and Iacob to geue them.