Verse 19. - And it shall be with him, etc. It was to be carefully kept by him, but not as a mere sacred deposit or palladium; it was to be constantly with him wherever he was, was to be the object of his continual study, and was to be the directory and guide of his daily life (cf. Joshua 1:8; Psalm 1:2; Psalm 119:15, 16, 24, 97-99, etc.).

17:14-20 God himself was in a particular manner Israel's King; and if they set another over them, it was necessary that he should choose the person. Accordingly, when the people desired a king, they applied to Samuel, a prophet of the Lord. In all cases, God's choice, if we can but know it, should direct, determine, and overrule ours. Laws are given for the prince that should be elected. He must carefully avoid every thing that would turn him from God and religion. Riches, honours, and pleasures, are three great hinderances of godliness, (the lusts of the flesh, the lusts of the eye, and the pride of life,) especially to those in high stations; against these the king is here warned. The king must carefully study the law of God, and make that his rule; and having a copy of the Scriptures of his own writing, must read therein all the days of his life. It is not enough to have Bibles, but we must use them, use them daily, as long as we live. Christ's scholars never learn above their Bibles, but will have constant occasion for them, till they come to that world where knowledge and love will be made perfect. The king's writing and reading were as nothing, if he did not practise what he wrote and read. And those who fear God and keep his commandments, will fare the better for it even in this world.And it shall be with him,.... Always, when at home or abroad, sitting on his throne or lying down, or wherever he went, unless in such places where it was not proper to read it, as the Jews observe (o): and he shall read therein all the days of his life; every day of his life; meditate on it night and day, as a good man does, that he might be well versed in it, and know how to govern his people according to it:

that he may learn to, fear the Lord his God; to serve and worship him both internally and externally, he having the fear of God always before his eyes, and on his heart, which the holy law of God directs to and instructs in:

to keep all the words of this law, and these statutes, to do them; not only such as concerned him as a king, but all others that concerned him as a man, a creature subject to the Lord, and as an Israelite belonging to the church and commonwealth of Israel, and so includes all laws, moral, ceremonial, and judicial.

(o) Maimon. Hilchot Melachim, c. 3. sect. 1.