यस्त्विन्द्रियाणि मनसा नियम्यारभतेऽर्जुन। कर्मेन्द्रियैः कर्मयोगमसक्तः स विशिष्यते ॥

yas tvindriyāṇi manasā niyamyārabhate ’rjuna karmendriyaiḥ karma-yogam asaktaḥ sa viśhiṣhyate

But who, controlling the senses by the mind, O Arjuna, with the organs of action without attachment, performeth yoga by action, he is worthy.

In plain words: Krishna says a person who controls his senses with his mind and does his work without clinging to results is truly worthy. This is the path of action.