Psalm 119:121-128 

    Have you ever had someone to "co-sign" a loan for you? That person became a "surety"  for you. A "surety" is a pledge or formal promise made to secure against loss, damage, or default; a guarantee or security-- To pledge one life for another (cf. Gen. 43:9). 
    One who has co-signed (the surety) becomes responsible for the debt in the event of default.  To be a surety one must: (1) Be willing; (2) Have the resources to secure the loan.
    Proverbs 11:15 says, "He that is surety for a stranger shall smart for it…"  That's what Jesus did for me-- "By so much was Jesus made a surety of a better testament" (Heb. 7:22). I was a stranger and He became my surety for good. He smarted for it! He paid the debt and delivered me from my oppressors--Sin, Satan, and the Sentence of death! 

    Let's notice four things about the Psalmist's surety:
I. HIS PURE CONSCIENCE (vs. 121-122). 
    A. He was saying he had done right ("judgment and justice"). 
    B. His prayer (v. 121b) is similar to that of Nehemiah-- "Think upon me, my God, for good, according to all that I have done for this people… Remember me, O my God, concerning this also, and spare me according to the greatness of thy mercy" (5:19; 13:22) and Isaiah (38:14--"O LORD, I am oppressed; undertake for me,").
II. HIS PURSUANT CONFIDENCE (vs. 123-125). Confidence never goes uncontested.
    A. Longing and waiting for God's salvation-- Conflict between impatience / unbelief and waiting on the Lord in faith (v. 123). "I am weary of my crying: my throat is dried: mine eyes fail while I wait for my God" (Ps. 69:3 cf. 143:6-12).
    B. Two basic needs of God's servants ("thy servant," vs. 124-125).
          1. I am guilty--Mercy in God's dealings (v. 124). The more you learn of God's statutes, the greater sense of your need of God's mercy.
          2. I am ignorant--Divine instruction / understanding of God's Word (vs. 124-125).
I obtain MERCY through the blood of Christ--TEACHING through the ministry of His Spirit. I first experience God's mercy in salvation, then I need God's instruction in following Him. 

III. HIS PLEA FOR CHANGE (v. 126). Doctrinally, this pertains to Daniel's 70th Week (Dan. 7:25). 
      A. When men seek to make void the Word of God-- How do men make void the law of God?
          1. By the theories of man
          2. By the traditions of man (Mk. 7:13).
          3. By the treachery of man (2 Cor. 7:17).
          4. By the twisting of man (2 Pet. 3:16).
      B. When nothing else will work-- When human resources have been exhausted.
  "God Likes To Work, When Nothing Else Will!" 
God likes to work when your back's to the wall.
When faith's in the balance and you're just about to fall.
So there'll be no mistaking when He blesses and heals.
God likes to work when nothing else will!

IV. HIS PREEMINENT CALCULATION (vs. 127-128). Notice again the essential contrasting virtues of hate and love. 
      A. If a man hates "every false way" in the 20th century, he'll end up with a list longer than his arm. False ways in politics, music, art, entertainment, law, religion, Bible translations, new media, psychology (psycho-babel). 
      B. God's way is right (v. 128), even when He doesn't appear to be right. 
      C. No one can put a price tag on the value of God's Word-- All the money in the world could not buy the wisdom and knowledge contained in this Book! (v. 127 cf. 19:10; Job 23:12; 28:16, 19). 
          1. Gold-- Divine provision. No man can manufacture gold.
          2. Gold-- Definitive standard of value. Is there anything in this world more valuable? Your heart will be where your treasure is (Mt. 6:21).
          3. A conductor of power. Only silver and copper are better conductors.
          4. Widely distributed, mostly in metallic form as dust, grains, flakes, or nuggets. (USA Today article on "The New Gold Rush" 7/21/97).
          5. Obtained through hard labor.
    D. The way the God's enemies attack the Bible shows the worth of it. If the Bible were not worth something, why would men spend so much time trying to get rid of it?
    E. Since the love of money is the root of all evil (1 Tim. 6:10), the love of God's Word is the root of all righteousness!