What does Psalms 119:70 mean?

Psalm 119:70 reads, "Their heart is as callous as the fat, but I delight in your law." In plain language, the psalmist is contrasting two very different responses to God's word. The "their" refers back to arrogant or wicked people mentioned earlier in this section of the psalm (verses 69-70 speak of the proud smearing him with lies). The image of a heart "callous as fat" draws on the ancient understanding of fat as thick, insensitive tissue — unlike lean flesh, fat doesn't respond readily to touch or pain. So the psalmist is saying that these people's hearts have grown thick, dull, and unresponsive to God, unmoved by truth, correction, or conscience. In sharp contrast, he declares that his own heart is soft and alive toward God's law — he doesn't just obey it grudgingly, he delights in it.

Psalm 119 is the longest chapter in the Bible, an extended acrostic poem devoted entirely to praising and meditating on God's law, word, statutes, and commandments. While the human author is traditionally unnamed (though often associated with David or a later psalmist writing during hardship), the psalm reflects the voice of someone facing opposition, mockery, and even persecution from proud or wicked people, yet who remains devoted to Scripture. Verse 69 tells us the proud have "smeared lies" on him, and verse 70 continues the thought: despite their scorn and hardness of heart, he clings to and treasures God's law rather than growing bitter or calloused himself.

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