to love Jehovah thy God, to hearken to His voice, and to cleave to Him (for He <FI>is<Fi> thy life, and the length of thy days), to dwell on the ground which Jehovah hath sworn to thy fathers, to Abraham, to Isaac, and to Jacob, to give to them.'
Deuteronomy 30:18 I have declared to you this day, that ye do certainly perish, ye do not prolong days on the ground which thou art passing over the Jordan to go in thither to possess it.
Deuteronomy 30:19 `I have caused to testify against you to-day the heavens and the earth; life and death I have set before thee, the blessing and the reviling; and thou hast fixed on life, so that thou dost live, thou and thy seed,
Deuteronomy 30:20 to love Jehovah thy God, to hearken to His voice, and to cleave to Him (for He <FI>is<Fi> thy life, and the length of thy days), to dwell on the ground which Jehovah hath sworn to thy fathers, to Abraham, to Isaac, and to Jacob, to give to them.'
The verse centers on "love", "jehovah", "hearken", "voice", "cleave", "life", "length", and "days". It is saying that the verse draws attention to "love" and "jehovah", so its meaning should be read from those terms before moving to application.
The prior verse says "I have caused to testify against you...", giving immediate footing for "love" and "jehovah". In Deuteronomy context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "love" and "jehovah" with trust shaped by these words, not by a vague optimism outside the passage.