Bhagavad Gita 3.37 · BG 3.37
Chapter 3Verse 37
Karma Yoga
काम एष क्रोध एष रजोगुणसमुद्भवः। महाशनो महापाप्मा विद्ध्येनमिह वैरिणम्॥
kāma eṣa krodha eṣa rajo-guṇa-samudbhavaḥ, mahāśano mahā-pāpmā viddhy enam iha vairiṇam
Translation
It is desire, it is anger, born of the mode of passion, all-consuming and deeply harmful. Know this to be the enemy here.
Unfilled wanting, and the anger when it's blocked. That's the enemy, and it's inside.
What does this mean?
When something keeps going wrong in your life, it's worth checking what's driving it. Krishna names desire and anger as the usual engine: the wanting that's never satisfied, and the resentment that follows when it's blocked. It's not a comfortable answer, but knowing where the trouble starts is the only way to deal with it.
In simple words
Arjuna asks what drives a person to do harm even against their own will. Krishna's answer is direct: desire, and the anger that shows up when desire is blocked. That's the enemy, he says, and it isn't outside you.
The deeper idea
The verse answers a specific question, what actually pushes people into destructive behavior. Krishna names it as one linked force: craving that's never satisfied, and the anger that erupts when the craving hits an obstacle. Born of the mode of passion ties it to the restless, grasping quality the Gita describes. Calling it the enemy here is deliberate. The trouble isn't primarily out in the world. It's an internal engine, and you can't deal with it until you'll admit where it lives.
How it applies to life
When there's a pattern in your life that keeps causing damage, the same kind of blowup, the same self-sabotage, it's worth tracing it back instead of blaming the circumstances each time. Usually you'll find a want that isn't being met and a flare of anger when something gets in its way. That's not a comfortable thing to locate in yourself. But it's the only place you can actually work on it.