John Gill's Bible Commentary Ver. 9. Only take heed to thyself , etc.] To walk according to this law, and not swerve from it: and keep thy soul diligently ; from the transgressions and breaches of it: lest thou forget the things which thine eyes have seen ; either the statutes and judgments set before them, and the circumstances of the delivery of them; or the punishment inflicted on the breakers of them; or the favours bestowed on those that observed them: and lest they depart from thy heart all the days of thy life ; out of thy mind and memory, and have no place in thy affections, through a neglect and disuse of them: but teach them thy sons, and thy sons’ sons ; their children and grandchildren, that they may be trained up in them in their youth, and so not depart from them when grown up, and in years; (see Deuteronomy 6:7).
Matthew Henry Commentary
Verses 1-23 - The power and love of God to Israel are here made the ground and reaso of a number of cautions and serious warnings; and although there is much reference to their national covenant, yet all may be applied to those who live under the gospel. What are laws made for but to be observed and obeyed? Our obedience as individuals cannot meri salvation; but it is the only evidence that we are partakers of the gift of God, which is eternal life through Jesus Christ, Considerin how many temptations we are compassed with, and what corrupt desires we have in our bosoms, we have great need to keep our hearts with all diligence. Those cannot walk aright, who walk carelessly. Moses charge particularly to take heed of the sin of idolatry. He shows how weak the temptation would be to those who thought aright; for these pretende gods, the sun, moon, and stars, were only blessings which the Lor their God had imparted to all nations. It is absurd to worship them shall we serve those that were made to serve us? Take heed lest y forget the covenant of the Lord your God. We must take heed lest at an time we forget our religion. Care, caution, and watchfulness, are help against a bad memory.
Original Hebrew רק7535 השׁמר8104 לך ושׁמר8104 נפשׁך5315 מאד3966 פן6435 תשׁכח7911 את853 הדברים1697 אשׁר834 ראו7200 עיניך5869 ופן6435 יסורו5493 מלבבך3824 כל3605 ימי3117 חייך2416 והודעתם3045 לבניך1121 ולבני1121 בניך׃1121