Passage
And Jehovah thy God will make thee plenteous in all the work of thy hand, in the fruit of thy body, and in the fruit of thy cattle, and in the fruit of thy ground, for good: for Jehovah will again rejoice over thee for good, as he rejoiced over thy fathers;
Nearby Context
Deuteronomy 30:7 And Jehovah thy God will put all these curses upon thine enemies, and on them that hate thee, that persecuted thee.
Deuteronomy 30:8 And thou shalt return and obey the voice of Jehovah, and do all his commandments which I command thee this day.
Deuteronomy 30:9 And Jehovah thy God will make thee plenteous in all the work of thy hand, in the fruit of thy body, and in the fruit of thy cattle, and in the fruit of thy ground, for good: for Jehovah will again rejoice over thee for good, as he rejoiced over thy fathers;
Deuteronomy 30:10 if thou shalt obey the voice of Jehovah thy God, to keep his commandments and his statutes which are written in this book of the law; if thou turn unto Jehovah thy God with all thy heart, and with all thy soul.
Deuteronomy 30:11 For this commandment which I command thee this day, it is not too hard for thee, neither is it far off.
Study Lenses
The verse centers on "for good", "jehovah", "make", "thee", "plenteous", "hand", "fruit", and "body". It is saying that the verse draws attention to "for good" and "jehovah", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 8's "And thou shalt return and obey the..." into verse 10's "if thou shalt obey the voice of...", so "for good" and "jehovah" belong inside that flow. In Deuteronomy context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "for good" and "jehovah" with trust shaped by these words, not by a vague optimism outside the passage.