(he) kaunteya–O Arjuna, son of Kuntī; jñānam–discriminatory knowledge; āvṛtam–is covered; etena–by this; nitya-vairiṇā–perpetual enemy; jñāninaḥ–of even knowledgable persons; kāma-rūpeṇa–in the form of desire; duṣpūreṇa analena cha–which is like insatiable fire.

[39]

Knowledge is covered by desire, the constant enemy of the wise. It burns like an insatiable fire (never satisfied by offerings of butter).