Passage
Thou shalt also consider in thine heart, that, as a man chasteneth his son, so the LORD thy God chasteneth thee.
Thou shalt also consider in thine heart, that, as a man chasteneth his son, so the LORD thy God chasteneth thee.
Deuteronomy 8:3 And he humbled thee, and suffered thee to hunger, and fed thee with manna, which thou knewest not, neither did thy fathers know; that he might make thee know that man doth not live by bread only, but by every word that proceedeth out of the mouth of the LORD doth man live.
Deuteronomy 8:4 Thy raiment waxed not old upon thee, neither did thy foot swell, these forty years.
Deuteronomy 8:5 Thou shalt also consider in thine heart, that, as a man chasteneth his son, so the LORD thy God chasteneth thee.
Deuteronomy 8:6 Therefore thou shalt keep the commandments of the LORD thy God, to walk in his ways, and to fear him.
Deuteronomy 8:7 For the LORD thy God bringeth thee into a good land, a land of brooks of water, of fountains and depths that spring out of valleys and hills;
The verse centers on "thou", "shalt", "consider", "thine", "heart", "chasteneth", and "lord". It is saying that the verse draws attention to "thou" and "shalt", so its meaning should be read from those terms before moving to application.
The nearby context moves from verse 4's "Thy raiment waxed not old upon thee..." into verse 6's "Therefore thou shalt keep the commandments of...", so "thou" and "shalt" 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 "thou" and "shalt" with trust shaped by these words, not by a vague optimism outside the passage.