Bhagavad Gita Chapter 3, Verse 39

आवृतं ज्ञानमेतेन ज्ञानिनो नित्यवैरिणा | कामरूपेण कौन्तेय दुष्पूरेणानलेन च ||

āvṛtaṁ jñānam etena jñānino nitya-vairiṇā kāma-rūpeṇa kaunteya duṣpūreṇānalena ca

Knowledge is enveloped by this eternal enemy of the wise in the form of desire, which is insatiable like fire, O son of Kunti.

Krishna repeats verse 3.38 almost word-for-word because this teaching is crucial. Your wisdom (jñānam) is covered (āvṛtam) by desire (kāma-rūpeṇa), which is your eternal enemy (nitya-vairiṇā). Here's the key insight: desire is duṣpūreṇānalena—impossible to satisfy, like fire. Feed fire one log, it wants another. Feed it a hundred, it still wants more. That's not a problem to solve—that's fire's nature. Same with desire. You think 'if I just get this, I'll be satisfied.' You won't. Desire will find something new to want. When you see this—that satisfaction through fulfilling desires is impossible by nature—the chase stops. Not because you got everything, but because you understood the game.