The third chapter of the Bhagavad Gita is Karma Yoga or the Path of Selfless Service. Here Lord Krishna emphasizes the importance of karma in life. He reveals that it is important for every human being to engage in some sort of activity in this material world. Further, he describes the kinds of actions that lead to bondage and the kinds that lead to liberation. Those persons who continue to perform their respective duties externally for the pleasure of the Supreme, without attachment to its rewards get liberation at the end.
Therefore, remaining unattached, always perform the obligatory duty, for, by performing (one's) duty without attachment, a person attains the Highest.OPEN VERSE
For Janaka and others strove to attain Liberation through action itself. You ought to perform (your duties) keeping also in view the prevention of mankind from going astray.OPEN VERSE
Whatever a superior person does, another person does that very thing! Whatever he upholds as authority, an ordinary person follows that.OPEN VERSE
In all the three worlds, O Partha, there is no duty whatsoever for Me (to fulfil); nothing remains unachieved or to be achieved. (Still) I continue in action.OPEN VERSE
For, O Partha, if at any time I do not continue vigilantly in action, men will follow My path in every way.OPEN VERSE
These worlds will be ruined if I do not perform action. And I shall become the agent of intermingling (of castes), and shall be destroying these beings.OPEN VERSE