Borrowed from Bible.org.
Psalm 119 shows us that the Word of God should have top priority in our lives. It stands as the giant among the Psalms–it is the longest psalm and the longest chapter in the Bible–176 verses. The psalm is an acrostic or alphabetic psalm, in which there are eight couplets beginning with each of the 22 letters of the Hebrew alphabet. Thus the first eight couplets begin with aleph (= A), the next eight with beth (= B), etc. Since the Book of Psalms is the longest book in the Bible, it shows us the priority of praise and worship to God. Since Psalm 119 is the longest psalm in the Bible, it shows us the priority of God’s Word to God; in fact, this longest chapter of the Bible is ALL ABOUT God’s Word
When God speaks, He does not mumble. The Bible is not a book of “helpful hints for happy living.” It speaks with authority. The terms used as synonyms for the Bible in this psalm convey the concept of authority:
(1) Law (v. 1; the main synonym, used 25x in this psalm) has the nuance of “teaching”; it can refer to a single command, to the first five books of Moses, or to all of Scripture (John 15:25; 1 Cor. 14:21). The law reveals God’s will for how His people are to live. Since it comes from God the law is not just for academic interest, but for obedience.
(2) Testimonies (v. 2; used 10x in the psalm), from a root meaning “to bear witness.” It points to the dependability of the Bible as a witness of things of God. It also has the nuance of warning.
(3) Ways (v. 3; used 7x of God’s ways in this psalm) refers to God’s characteristic manner of acting, as contrasted with our ways (119:5, 26, 29, 59, 168).
(4) Precepts (v. 4; 21x in the psalm) comes from a word meaning to oversee or pay close attention to a matter. Thus it “points to the particular instructions of the Lord, as of one who cares about detail” (Derek Kidner, Psalms [IVP], 2:418).
(5) Statutes (v. 5; 22x in the psalm) comes from a word meaning “to engrave in stone” and thus they “speak of the binding force and permanence of Scripture” (Kidner).
(6) Commandments (v. 6, 22x in the psalm) points to “the straight authority of what is said” (Kidner). It has the idea of giving orders.
(7) Judgments or ordinances (NASB, vv. 7, 13, same Hebrew word; 23x in the psalm) has the idea of justice rooted in God’s character. These are “the decisions of the all-wise Judge about common human situations” (Kidner).
(8) Word (v. 9; 23x in the psalm) is the most general term of all, emphasizing the fact that God has spoken.
(9) Word (v. 11; 19x in the psalm) is similar to the previous term. It is derived from the verb “to say” and may sometimes have the nuance of promise (NASB margin, vv. 38, 41).
(10) Faithfulness (v. 90), righteousness (v. 40), and name (v. 132) are also sometimes cited as synonyms for the Scriptures in this psalm.
The sum effect of these terms is that the Scriptures speak with God’s authority. They are not Reader’s Digest type hints on how to live or suggestions for success. What the Bible says, God says. Obedience is not optional for us as believers.
Psalm 119:105 Thy word is a lamp unto my feet, and a light unto my path.