Bhagavad Gita Verse 18.48

अतएव हे कुन्ती पुत्र ! दोष युक्त्त होने पर भी सहज कर्म को नहीं त्यागना चाहिये ; क्योंकि धुऍ से अग्नि की भाँति सभी कर्म किसी न किसी दोष से युक्त्त हैं ।

A man should never foresake his own tasks, even if he cannot complete them in full perfection, simply because it is a known fact that every (human) endeavour consists of some fault or imperfection just as all fire consists of smoke.