Bhagavad Gita · Chapter 3: The Path of Action

Bhagavad Gita 3.22

na me pārthāsti kartavyaṃ triṣu lokeṣu kiñcana | nānavāptamavāptavyaṃ varta eva ca karmaṇi ||

There is nothing in the three worlds, Arjuna, that I must do, and nothing unattained that I need to attain. Yet I continue to act.

Modern context

Krishna offers himself as the example. He has no duty in all the worlds and nothing left to gain, and still he works. He asks nothing of Arjuna that he does not do himself. Authority of the best kind comes from that: the teacher is already doing what he teaches.