13 "If you carefully obey the commands I am giving you today, and if you love the Lord your God and serve him with all your heart and soul, 14 then he will send the rains in their proper seasons-the early and late rains-so you can bring in your harvests of grain, new wine, and olive oil. 15 He will give you lush pastureland for your livestock, and you yourselves will have all you want to eat. 16 "But be careful. Don't let your heart be deceived so that you turn away from the Lord and serve and worship other gods. 17 If you do, the Lord 's anger will burn against you. He will shut up the sky and hold back the rain, and the ground will fail to produce its harvests. Then you will quickly die in that good land the Lord is giving you.

18 "So commit yourselves wholeheartedly to these words of mine. Tie them to your hands and wear them on your forehead as reminders. 19 Teach them to your children. Talk about them when you are at home and when you are on the road, when you are going to bed and when you are getting up. 20 Write them on the doorposts of your house and on your gates, 21 so that as long as the sky remains above the earth, you and your children may flourish in the land the Lord swore to give your ancestors.

Matthew Henry's Commentary on Deuteronomy 11:13-21

Commentary on Deuteronomy 11:8-17

(Read Deuteronomy 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.

Commentary on Deuteronomy 11:18-25

(Read Deuteronomy 11:18-25)

Let all be directed by the three rules here given. 1. Let our hearts be filled with the word of God. There will not be good practices in the life, unless there be good thoughts, good affections, and good principles in the heart. 2. Let our eyes be fixed upon the word of God, having constant regard to it as the guide of our way, as the rule of our work, Psalm 119:30. 3. Let our tongues be employed about the word of God. Nor will any thing do more to cause prosperity, and keeping up religion in a nation, than the good education of children.