"...having regard to your own duty also, you ought not to falter. For there is nothing better for a Kshatriya than a righteous battle." The Bhagavad Gita is a section of a much larger epic poem called the Mahabharata, which basically tells the complicated and long story of a war between two kingdoms. And we can really see how important Dharma is in this passage, because Krishna is basically telling Arjuna that because he is a warrior, a Kshatriya, he must fight. Even if he's bad at it, like for instance if he gets killed, it's still preferable to not living his Dharma. It's better to be a bad warrior if you're a Kshatriya than to be the world's best baker. Basically, you're better off fulfilling your own Dharma poorly than doing someone else's well.