Isaiah 42:21: God's law's greatness?
How does Isaiah 42:21 reveal God's commitment to His law's greatness?

Setting the Scene

Isaiah 42 sits within a section where God introduces His Servant who will bring justice to the nations (vv. 1-4). Verse 21 zooms out for a moment, spotlighting the Lord Himself and His passion for His own standard.


Isaiah 42:21

“The LORD was pleased, for the sake of His righteousness, to magnify His law and make it glorious.”


Key Phrase Breakdown

• “The LORD was pleased”

 – God takes personal delight in what follows; it is not reluctant maintenance but joyful purpose.

• “for the sake of His righteousness”

 – His character drives His actions. Because He is perfectly righteous, He must uphold what is right.

• “to magnify His law”

 – “Magnify” means to make great, enlarge, lift up. The Torah is not sidelined; God actively elevates it.

• “and make it glorious”

 – The law shines with weighty splendor, reflecting God’s own glory (cf. Psalm 19:7-9).


God’s Delight in His Law

• The verse shows that God’s righteousness and His law are inseparable.

• Upholding the law is not merely judicial—it is relational. God loves what mirrors His nature.

• Magnifying the law ensures that every generation sees its relevance and authority (Deuteronomy 6:6-9).


Law: Magnified and Glorious

1. Clarifies God’s Standards

 – The commandments expose sin and reveal holiness (Romans 7:7).

2. Guards Covenant Blessings

 – Obedience leads to life and peace (Leviticus 26:3-13).

3. Points to the Servant-Redeemer

 – By exalting the law, God also exposes humanity’s need for the Messiah who fulfills it (Isaiah 53:5-6; Matthew 5:17-18).


New Testament Echoes

Matthew 5:17-18 — Jesus affirms that not “the smallest letter” of the law will pass until all is accomplished.

Romans 3:31 — “Do we, then, nullify the law by this faith? Certainly not! Instead, we uphold the law.”

1 Timothy 1:8 — “We know that the law is good if one uses it legitimately.”


Takeaways for Believers Today

• Celebrate the law’s greatness—study it, memorize it, let it shape conscience and conduct (Psalm 119:97).

• See Christ more clearly—every precept points to the One who perfectly embodies God’s righteousness (2 Corinthians 5:21).

• Live with confidence—God’s unwavering commitment to His law guarantees the stability of His promises (Psalm 111:7-8).

What is the meaning of Isaiah 42:21?
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