Moses commands them to keep all the commandments so that they may live, multiply and possess the land. He orders them to remember the whole way the Lord led them for forty years in the wilderness, to humble them and test them, to know what was in their heart and whether they would keep his commandments or not.
He humbled them and let them be hungry, and fed them with manna, which neither they nor their fathers had known, to teach them that man does not live by bread alone but by everything that comes from the mouth of the Lord. In those years their clothing did not wear out and their feet did not swell. Moses calls them to recognize that the Lord was disciplining them as a father disciplines his son.
The land awaiting them is good: brooks and springs, wheat and barley, vines, fig trees and pomegranates, olive oil and honey, a land where bread will not be scarce, with iron in its stones and copper in its hills. They will eat and be full and bless the Lord for the good land.
But Moses warns against forgetting. When they eat and are full, build good houses, and their herds, silver and gold multiply, their heart may be lifted up. Then they might say that their power and the strength of their hand gave them this wealth. Moses commands them to remember that it is the Lord who gives power to get wealth, to confirm his covenant. If they forget the Lord and follow other gods, they will perish like the nations he destroys.