My Son Do Not Forget My Law.

We must have a continual regard to God's precepts. We must, Fix God's law, and his commandments, as our rule, by which we will in every thing be ruled and to which we will yield obedience. We must acquaint ourselves with them for we cannot be said to forget that which we never knew. We must remember them so that they may be ready to us whenever we have occasion to use them. Our wills and affections must be subject to them and must in every thing conform to them. Not only our heads, but our hearts, must keep God's commandments in them, as in the ark of the testimony, both the tables of the law must be deposited. - Matthew Henry