आवृतं ज्ञानमेतेन ज्ञानिनो नित्यवैरिणा।
कामरूपेण कौन्तेय दुष्पूरेणानलेन च।।3.39।।
3.39 O son of Kunti, Knowledge is covered by this constant enemy of the wise in the form of desire, which is an insatiable fire.
3.39 The knowledge, having the self for its subject, of this embodied person (the Jiva) whose nature is knowledge, is enveloped by this constant enemy in the shape of desire, which brings about attachment for sense-objects. This desire is difficult to satisfy, i.e., has for its object things unworthy of attainment and is insatiable, i.e., never attains satisfaction. Now listen to what constitutes the instruments with which desire subdues the self. Sri Krsna goes on to expound this:
Aavritam jnaanam etena jnaanino nityavairinaa; Kaamaroopena kaunteya dushpoorenaanalena cha.
āvṛitam—covered; jñānam—knowledge; etena—by this; jñāninaḥ—of the wise; nitya-vairiṇā—by the perpetual enemy; kāma-rūpeṇa—in the form of desires; kaunteya—Arjun the son of Kunti; duṣhpūreṇa—insatiable; analena—like fire; cha—and