Kings such as Janaka attained perfection solely by performance of prescribed duties. Therefore, just for the sake of educating the people in general, you should perform your work.
कर्मणैव हि संसिद्धिमास्थिता जनकादयः । लोकसङ्ग्रहमेवापि सम्पश्यन्कर्तुमर्हसि ॥ २० ॥
karmaṇaiva hi saṁsiddhim āsthitā janakādayaḥ loka-saṅgraham evāpi sampaśyan kartum arhasi
Synonyms karmaṇā — by work; eva — even; hi — certainly; saṁsiddhim — in perfection; āsthitāḥ — situated; janaka-ādayaḥ — Janaka and other kings; loka-saṅgraham — the people in general; eva api — also; sampaśyan — considering; kartum — to act; arhasi — you deserve.