Matthew Poole and continuators on Deuteronomy 8:16

16 Who fed thee in the wilderness with manna, which thy fathers knew not, that he might humble thee , and that he might prove thee good at thy latter end .)

By keeping thee in a constant dependance upon him for every dayes food, and convincing thee what an impotent, helpless, and beggerly Creature thou art in thy self, having, nothing whereon to subsist, but from hand to mouth, and being supported wholly by the alms of divine goodness given to thee from day to day. The mercies of God, if duly considered, are as powerful an argument or mean to humble us as the greatest afflictions, because they increase our debts to God, and manifest our dependance upon him, and insufficiency without him, and by making God great, they make us little in our own eyes. Though this clause, as well as that which follows, may have respect to their afflictions, mentioned, v. 15.

(i. e.) That after he hath purged and prepared thee by afflictions, he may give thee, and thou mayest receive and enjoy his blessings with less disadvantage, whilest by the remembrance of former afflictions thou art made thankful for them, and more cautious not to abuse and forfeit them again.

Marginal references: Exod. 16. 15.