Isaiah 51:8 (KJV)

What does Isaiah 51:8 mean?

Isaiah 51:8 says that people who oppose God will fade away and be destroyed, just like clothes eaten by moths or wool ruined by worms, but God’s righteousness and salvation will last forever and continue through every generation. The verse contrasts the temporary nature of human power with the everlasting nature of God’s goodness and rescue.

In this part of Isaiah, God is speaking through the prophet to comfort His people, who are facing threats and feeling discouraged. Isaiah uses everyday images—moths and worms ruining clothing—to show how fragile and short-lived human enemies are. The verse reassures the people that, unlike their troubles, God’s commitment to what is right and His power to save will never end.

The Hebrew behind Isaiah 51:8

• The word for “moth” is עָשׁ (ʿāsh), which refers to a small insect that destroys fabric, emphasizing how quietly and completely something can be ruined over time.
• The word for “worm” is תּוֹלֵעָה (tōlēʿāh), often understood as a maggot or larva that feeds on wool, reinforcing the idea of slow but certain decay.
• The word for “righteousness” is צְדָקָה (tsĕdāqāh), meaning God’s faithfulness to do what is right and just, not just moral goodness but also His commitment to His promises.
• The word for “salvation” is יְשׁוּעָה (yeshuʿāh), which means deliverance or rescue, highlighting God’s active role in saving His people from harm.

Why Isaiah 51:8 matters

• Isaiah 51:8 helps clear up the idea that powerful people or threats will last forever; it shows that only God’s goodness and saving power truly endure.
• The verse emphasizes that God’s promises are not just for one moment but continue “from generation to generation,” giving lasting hope to those who trust Him.
• Isaiah 51:8 ties into the larger message of Isaiah 51, where God encourages His people not to fear their enemies because those enemies are temporary, but God’s faithfulness is permanent.