Arjuna, confused, asks why he must act at all if knowledge is higher. Krishna's answer is the yoga of action: no one can stop acting, so act as an offering, keep the great wheel of the world turning, lead by example, and know the real enemy, desire, which hides wisdom the way smoke hides fire. Like the sun, the wise never stop working.
If knowledge is higher, Arjuna asks, why push me into this terrible war? Krishna answers that no one can stay without acting even for a moment: the three qualities of nature keep everyone moving. Better to act well than to pretend to renounce.
Sinless one, as I said before, there are two paths in this world: the path of knowledge for those given to contemplation, and the path of action for those given to yoga.
niyataṃ kuru karma tvaṃ karma jyāyo hyakarmaṇaḥ śarīrayātrāpi ca te na prasiddhyedakarmaṇaḥ
Do the work that is yours, for action is better than inaction. Without action, even the upkeep of your body would not be possible.
Verses 3.9–3.16
Work as an offering
Krishna describes the great cycle: action becomes offering, offering brings rain, rain brings grain, grain sustains beings, and beings act again (3.14). Whoever only takes from the wheel and gives nothing back, he says, is simply a thief.
In the beginning the Creator brought forth beings together with sacrifice and said: by this you shall flourish; let it be the cow that grants your wishes.
evaṃ pravartitaṃ cakraṃ nānuvartayatīha yaḥ aghāyurindriyārāmo moghaṃ pārtha sa jīvati
Whoever does not keep turning the wheel set in motion this way lives in sin, delighting only in the senses; that life is lived in vain, Partha.
Verses 3.17–3.26
Whatever the best do, others follow
Even one who needs nothing should keep working for the good of the world, as King Janaka did. Krishna himself, with nothing left to gain, never stops, because if he did, everyone would follow. One lamp lights the next.
na buddhibhedaṃ janayedajñānāṃ karmasaṅginām joṣayetsarvakarmāṇi vidvān yuktaḥ samācaran
The wise should not unsettle the minds of the ignorant who are attached to action. Acting with discipline themselves, they should inspire others to do all their work gladly.
Verses 3.27–3.35
"I am the doer"
Nature's qualities do the work, yet the ego wears the crown and says "I did this." Krishna asks Arjuna to offer every action to him, to watch the pull of liking and disliking, and to keep to his own dharma, even imperfectly, rather than live someone else's well.
tattvavittu mahābāho guṇakarmavibhāgayoḥ guṇā guṇeṣu vartanta iti matvā na sajjate
But one who knows the truth about the qualities and their workings, mighty-armed, sees that it is qualities moving among qualities, and is not attached.
Better your own dharma, even done imperfectly, than another's done well. Better to die in your own dharma; another's dharma is full of fear.
Verses 3.36–3.43
Fire covered by smoke
What pushes people into wrong, Arjuna asks, even against their will? Desire, says Krishna, and its twin, anger. It covers wisdom as smoke covers fire, dust a mirror, the womb an unborn child. It lives in the senses, mind and intellect, but the Self is higher than all three.