BG Chap 18 - Doing one's duties even with fault

Someone may look at their own duties which are filled with passion and may lose taste for them. The duties of kṣatriyas involve violence and those of vaiśyas involve untruthfulness. But still it is better to perform duties according to one’s nature though inferior than to perform another’s duties which are superior. A kṣatriya or vaiśya should not think that subsisting on grains fallen on a field as a brāhmaṇa is superior. This is because the duties are prescribed by scriptures corresponding to one’s qualities and by doing them one does not incur any sin. Just as there is no fault in the violence of sacrificing animals because it is ordained by scripture, so there is no fault in the violence or untruthfulness which is part of fighting or business, because it is ordained as duty by scripture. Thus it is better to engage in one’s own occupation, even though one may perform it imperfectly, than to accept another’s occupation and perform it perfectly. And as explained before, one should worship Kṛṣṇa thru his duties. Anything done for personal sense gratification is a cause of bondage. Everyone should be engaged according to the particular mode of nature he has acquired, and he should decide to work only to serve the supreme cause of the Supreme Lord.

All undertakings are covered by fault just as fire is covered by smoke. Thus one should not give up work which is according to his nature. The activities of all the varṇas, including those of the brāhmaṇa, are contaminated with some fault, since they are all composed of the guṇas and must be accomplished by using material ingredients. One should cleanse away the faulty part of one’s duty by offering the duty to the Supreme Lord. And for the sake of self realization one should give careful attention to that part of his duty which gives rise to knowledge. Detachment and devotion while working, not renunciation of the activity, will cancel the defects inherent in the work.