Matthew Henry Commentary Deuteronomy 6:17-25

"Ye shall diligently keep the commandments of Jehovah your God, and his testimonies, and his statutes, which he hath commanded thee. And thou shalt do that which is right and good in the sight of Jehovah; that it may be well with thee, and that thou mayest go in and possess the good land which Jehovah sware unto thy fathers, to thrust out all thine enemies from before thee, as Jehovah hath spoken. When thy son asketh thee in time to come, saying, What mean the testimonies, and the statutes, and the ordinances, which Jehovah our God hath commanded you? then thou shalt say unto thy son, We were Pharaoh`s bondmen in Egypt: and Jehovah brought us out of Egypt with a mighty hand; and Jehovah showed signs and wonders, great and sore, upon Egypt, upon Pharaoh, and upon all his house, before our eyes; and he brought us out from thence, that he might bring us in, to give us the land which he sware unto our fathers. And Jehovah commanded us to do all these statutes, to fear Jehovah our God, for our good always, that he might preserve us alive, as at this day. And it shall be righteousness unto us, if we observe to do all this commandment before Jehovah our God, as he hath commanded us." — Deuteronomy 6:17-25 (ASV)

Moses gives charge to keep God's commandments. Negligence will ruin us, but we cannot be saved without diligence. It is our interest, as well as our duty, to be religious. It will be our life.

Godliness has the promise of the continuation and comfort of this present life, insofar as it is for God's glory. It will be our righteousness. It is only through the Mediator that we can be righteous before God.

The knowledge of the spirituality and excellence of the holy law of God is suited to show sinful man his need of a Savior and to prepare his heart to welcome a free salvation. The gospel honors the law, not only through the perfect obedience of the Son of God, the Lord Jesus Christ. Moreover, the gospel is a plan for bringing back apostate rebels and enemies—by repentance, faith, forgiveness, and renewing grace—to love God above all things, even in this world, and, in the world above, to love him perfectly, just as angels love him.