न हि कश्चित्क्षणमपि जातु तिष्ठत्यकर्मकृत् ।कार्यते ह्यवशः कर्म सर्वः प्रकृतिजैर्गुणैः ॥
na hi kaścitkṣaṇamapi jātu tiṣṭhatyakarmakṛt |kāryate hyavaśaḥ karma sarvaḥ prakṛtijairguṇaiḥ ||
No one ever remains even for a moment without acting, for everyone is made to act, helplessly, by the gunas born of nature.
Explanation
Krishna is continuing his answer to Arjuna's confusion about action versus renunciation. He says that no living being can stop acting, because the three gunas (the qualities of nature: sattva, rajas and tamas) keep everyone in motion. The point is that giving up action is not really possible, so the real question is how to act. Here 'action' (karma) covers all activity, including thinking and breathing, not only ritual or work.