Moreover by them is your servant warned: and in keeping of them there is great reward.
In this Psalm David speaks of the two great books by which God administers instruction. The volume of nature. The volume of inspiration. Having enlarged on the excellent properties and glorious effects of the Divine Word, he illustrates its value by a comparison with the things of this world, by the results of his experience, and the infinite advantage connected with the observance of it. David possessed, in the Scriptures then extant, an abstract of all those glorious truths revealed to ourselves, and an abstract of sufficient clearness to guide him to God, to peace, to holiness, to heaven. The possession of the Scriptures, however, is not sufficient to bring the soul to God. These statutes must be kept as well as possessed, for it is in keeping them that there is great reward. The book not only supplies ideas, it also raises the character of the humble student. The Scripture is a book of privileges. There is not a Christian but is entitled to all the clustering promises which grow on this tree of life. Practice is necessary to complete our duty to the Scriptures. All religion hinges upon this point. The Psalmist says, "In keeping of them there is great reward." Reward is that which is earned by an equivalent, or that which is a suitable recompense for the action performed. But the reward of observing the Word of God is not merely a consequence, neither is it earned by what can be claimed as an equivalent. They are rewards of grace, both in this life and in the future life.
(T. Kennion, M. A.)
Parallel VersesKJV: Moreover by them is thy servant warned: and in keeping of them there is great reward.