That his heart be not lifted up He intimates, that the Scriptures, diligently read, are a powerful means to keep a person humble, because they show him that, though a king, he is subject to a higher monarch, to whom he must give an account of all his administrations, and receive from him his sentence, agreeably to their quality, which is sufficient to abate the pride of the haughtiest person in the world.
Related Commentaries of Deuteronomy 17:20
Deuteronomy 17:20
20 That his heart be not lifted up above his brethren, and that he turn not aside from the commandment, to the right hand, or to the left: to the end that he may prolong his days in his kingdom, he, and his children, in the midst of Israel.