Take heed to yourselves, that your heart be not deceived,.... By observing the influence of the heavens upon the fruitfulness of the earth, and so be drawn to the worship of the host of them, the sun, moon, and stars; or by the examples of nations round about them; and by the plausible arguments they may make use of, taken from the traditions of ancestors, from antiquity, and the consent of nations, and the great numbers of worshippers, and the like:

and ye turn aside; from the true God, and the worship of him; or from the law, as Jarchi, which directs to the worship of one God, and forbids idolatry, or the worshipping of images:

and serve other gods, and worship them; other gods than the one only living and true God; gods that made not the heavens and the earth, and which cannot give rain, nor any blessing and mercy of life, nor help and deliver their worshippers when in distress.

But if, on the other hand, their heart was foolish to turn away from the Lord and serve other gods, the wrath of the Lord would burn against them, and God would shut up the heaven, that no rain should fall and the earth should yield no produce, and they would speedily perish (cf. Leviticus 26:19-20, and Deuteronomy 28:23-24). Let them therefore impress the words now set before them very deeply upon themselves and their children (Deuteronomy 11:18-21, in which there is in part a verbal repetition of Deuteronomy 6:6-9). The words, "as the days of the heaven above the earth," i.e., as long as the heaven continues above the earth, - in other words, to all eternity (cf. Psalm 89:30; Job. Deu 14:12), - belong to the main sentence, "that your days may be multiplied," etc. (Deuteronomy 11:21). "The promise to give the land to Israel for ever was not made unconditionally; an unconditional promise is precluded by the words, 'that your days may be multiplied'" (Schultz). (For further remarks, see at Deuteronomy 30:3-5.) For (Deuteronomy 11:22-25) if they adhered faithfully to the Lord, He would drive out before them all the nations that dwelt in the land, and would give them the land upon which they trod in all its length and breadth, and so fill the Canaanites with fear and terror before them, that no one should be able to stand against them. (On Deuteronomy 11:23, cf. Deuteronomy 7:1-2; Deuteronomy 9:1, and Deuteronomy 1:28.) The words, "every place whereon the soles of your feet shall tread shall be yours," are defined more precisely, and restricted to the land of Canaan on both sides of the Jordan by the boundaries which follow: "from the desert (of Arabia on the south), and Lebanon (on the north), and from the river Euphrates (on the east) to the hinder sea" (the Mediterranean on the west; see Numbers 34:6). The Euphrates is given as the eastern boundary, as in Deuteronomy 1:7, according to the promise in Genesis 15:18. (On Deuteronomy 11:25, cf. Deuteronomy 7:24; Deuteronomy 2:25, and Exodus 23:27.)

Take heed to yourselves, that your heart be not {f} deceived, and ye turn aside, and serve other gods, and worship them;

(f) By devising foolish devotions according to your own fantasies.

11:8-17 Moses sets before them, for the future, life and death, the blessing and the curse, according as they did or did not keep God's commandment. Sin tends to shorten the days of all men, and to shorten the days of a people's prosperity. God will bless them with an abundance of all good things, if they would love him and serve him. Godliness has the promise of the life that now is; but the favour of God shall put gladness into the heart, more than the increase of corn, and wine, and oil. Revolt from God to idols would certainly be their ruin. Take heed that your hearts be not deceived. All who forsake God to set their affection upon any creature, will find themselves wretchedly deceived, to their own destruction; and this will make it worse, that it was for want of taking heed.