Passage
Then thine heart be lifted vp and thou forget the Lord thy God, which brought thee out of the land of Egypt, from the house of bondage,
Then thine heart be lifted vp and thou forget the Lord thy God, which brought thee out of the land of Egypt, from the house of bondage,
Deuteronomy 8:12 Lest when thou hast eaten and filled thy selfe, and hast built goodly houses and dwelt therein,
Deuteronomy 8:13 And thy beastes, and thy sheepe are increased, and thy siluer and golde is multiplied, and all that thou hast is increased,
Deuteronomy 8:14 Then thine heart be lifted vp and thou forget the Lord thy God, which brought thee out of the land of Egypt, from the house of bondage,
Deuteronomy 8:15 Who was thy guide in the great and terrible wildernes (wherein were fierie serpents, and scorpions, and drought, where was no water, who brought forth water for thee out of ye rock of flint:
Deuteronomy 8:16 Who fed thee in the wildernesse with MAN, which thy fathers knewe not) to humble thee, and and to proue thee, that he might doe thee good at thy latter ende.
The verse centers on "thine", "heart", "lifted", "thou", "forget", "lord", "brought", and "thee". It is saying that the verse draws attention to "thine" and "heart", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 13's "And thy beastes and thy sheepe are..." into verse 15's "Who was thy guide in the great...", so "thine" and "heart" 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 "thine" and "heart" with trust shaped by these words, not by a vague optimism outside the passage.