Bhagavad Gita Chapter 3, Verse 37

श्रीभगवानुवाच | काम एष क्रोध एष रजोगुणसमुद्भवः | महाशनो महापाप्मा विद्ध्येनमिह वैरिणम् ||

śrī-bhagavān uvāca kāma eṣa krodha eṣa rajo-guṇa-samudbhavaḥ mahāśano mahā-pāpmā viddhy enam iha vairiṇam

The Lord said: It is desire, it is anger, born of the mode of passion (rajas), all-devouring, greatly sinful—know this as the enemy here.

After Arjuna asks 'what compels me to sin?' (3.36), Krishna answers with devastating precision: 'Kāma eṣa krodha eṣa'—it is desire (kāma), it is anger (krodha). Not external forces, but internal ones. 'Rajo-guṇa-samudbhavaḥ'—born of rajas, the mode of passion within you. 'Mahāśano'—all-devouring, insatiable like fire that grows hungrier with feeding. 'Mahā-pāpmā'—greatly harmful, leading to suffering. 'Viddhy enam iha vairiṇam'—know this as your enemy. Revolutionary: the enemy isn't others or circumstances, but your own desire-anger cycle.