Blessed are those who walk in the perfect way, who walk in the law of the LORD. - Psalm 119:1
The singular blending of testimony, prayer, and praise in Psalm 119 is admirable. In one verse, the psalmist bears witness; in a second verse, he praises; in a third verse, he prays. It is an incense made up of many spices, but they are wonderfully mixed and worked together to form one perfect sweetness. The blending greatly increases the value of the whole. You would not like to have the first third of the psalm composed of prayer, then second third made up exclusively of praise, and the third portion entirely made of testimony. It is best to have all these divinely sweet ingredients intermixed and worked together into a sacred unity, as you have them in this thrice-hallowed psalm. Its prayers bear witness, and its testimonies are fragrant with praise.
This wonderful psalm, from its great length, helps us to marvel at the immensity of Scripture. As it keeps to the same subject, it helps us adore the unity of Scripture. Yet, from the many turns it brings to that one subject, it helps us see the variety of Scripture. How manifold are the words and thoughts of God! In His Word, just as in creation, the wonders of His skill are displayed in many ways.