Do your duty without attachment to the fruit of the action.
What the book is
On the edge of a battlefield, Arjuna sees family on both sides and puts down his bow. Krishna's answer — the entire Gita — is that withdrawal is not purity. You are in the field. Refusing your role is also an act, and usually a worse one.
The core discipline
Do your duty without attachment to the fruit. Act because it is yours to do, then release the outcome. This is not indifference — Arjuna is told to fight well — it is the removal of the anxiety that comes from staking your identity on results you do not control.
How it lands on a modern man
Two failures follow every man: doing another man's work because it looks more admirable, and doing his own work while grasping at what it will get him. Your dharma is the concrete role in front of you — this job, these children, this obligation. Do it fully. Let the reward be the doing.
The marrow
- You have a right to your action, never to its fruits.
- Better your own duty done imperfectly than another's done well.
- Withdrawal from the field is a choice, not neutrality.
- Steadiness of mind is trainable, like a muscle.