Here is, 1. David's great affection for the word of God: Thy servant loves it. Every good man, being a servant of God, loves the word of God, because it lets him know his Master's will and directs him in his Master's work. Wherever there is grace there is a warm attachment to the word of God. 2. The ground and reason of that affection; he saw it to be very pure, and therefore he loved it. Our love to the word of God is then an evidence of our love to God when we love it for the sake of its purity, because it bears the image of God's holiness and is designed to make us partakers of his holiness. It commands purity, and, as it is itself refined from all corrupt mixture, so if we receive it in the light and love of it it will refine us from the dross of worldliness and fleshly-mindedness.