This chapter is called “Path of Action” (Karm-Yog in Sanskrit).
Arjun asked the God that if Knowledge was superior than Action, why then he was being asked to act and fight? He expressed his confusion about which path was better -- the Knowledge Path or The Path of Action.
The God explained that both paths reached to God only. But the one who has renounced the world too has to perform actions required by nature. Everyone was bound by nature’s attributes. He further clarified that action performed without greed for fruit is pure and such action itself is equal to sacrifice. Such sacrifice pleases the Gods and they bestow necessary fruits to the doer. Beings survive on food, rains felicitate food production and rains happen due to action with sacrifice. Action must be performed as duty and not for gain of fruit. While performing action one must remain satisfied within inner self. Such performer of action is called ‘ unconcerned.’
Action happens due to Nature’s attributes but the egoistic person thinks that he is the doer. Attributing action and the result of action to God, releases one from bondage of birth and death. One should follow path of own natural instincts without worrying about other seemingly better paths.
God further explained that desires were the cause of arrogance and anger which forces one to act irrationally and therefore one must control desires. Senses are good if controlled, mind is better than senses, intellect is superior to mind and the God is superior to intellect. Knowing this control your desires and be at peace.