The grand end of all God's dealings with the Israelites in the desert, both the trials to which they were subjected and the benefits they received, was that he might do them good ultimately. Thy latter end; not the end of life, as in Numbers 23:10, but the state ensuing on the termination of their period of discipline and probation in the desert (cf. Job 8:7; Job 42:12; 2 Peter 2:20). God thus dealt with the Israelites as he still deals with his people; he afflicts them not for his pleasure but for their profit (Hebrews 11:12); he subjects them to trial and varied discipline that he may fit them for the rest and joy that in the end are to be theirs.
The blessing in store for them was God's free gift to them; and when they came to enjoy it they were not to allow themselves to say in their heart, i.e. to think or imagine, that the prosperous condition in which they were placed was the result of their own exertions; they were to ascribe all to God's gracious bounty, for from him had come the power by which prosperity had been gained, and this he had given, not on account of any merit in them, but that he might fulfill his covenant engagements to their fathers. Get wealth עָשָׂה חַיִל, to make strength, to gather substance (Genesis 12:5), to procure wealth. As it is this day. "As was quite evident then, when the establishment of the covenant had already commenced, and Israel had come through the desert to the border of Canaan (see Deuteronomy 4:20)" (Keil).
Moses enforces his counsel by reminding them again that only destruction awaited them should they forget the Lord their God and apostatize from him (cf. Deuteronomy 4:25, etc.; Deuteronomy 6:14).
HOMILETICS