A.T. Pierson notes that three psalms – Psa 1, Psa 19 and Psa 119 – pay special tribute to the law of the Lord.

The second and third pick up the subject where the previous left it, and no two cover the same ground.

Psa 1 depicts the blessedness of him whose delight is found in meditating upon Holy Scripture.  Here, the lover and doer of God’s word and the hater and scorner are contrasted in character, conduct and destiny.

Psa 19 compares it with the Heavens as a field for the display of its author’s glorious perfections.  The heavens are compared in ten respects with as many of the perfections of Scripture

Psa 119 exhaustively presents its manifold attractions as a law of life, a counselor and guide.  Every letter of the Hebrew alphabet heads an eightfold acrostic, as though to hint that if all possible combinations of letters are exhausted the excellence of the Holy Scriptures as a practical and personal guide to doctrine and duty cannot be expressed.

(Knowing the Scriptures.  Largely in the words of the author, but slightly re-arranged)