Bhagavad Gita Chapter 2, Verse 36

अवाच्यवादांश्च बहून्वदिष्यन्ति तवाहिताः | निन्दन्तस्तव सामर्थ्यं ततो दुःखतरं नु किम् ||

avācya-vādāṁś ca bahūn vadiṣyanti tavāhitāḥ nindantas tava sāmarthyaṁ tato duḥkhataraṁ nu kim

Your enemies will speak many unspeakable words, scorning your ability. What could be more painful than that?

Krishna delivers the final psychological blow: enemies will speak 'avācya-vādān bahūn' (many unspeakable words)—insults so harsh they shouldn't be uttered but will be. They'll mock your 'sāmarthyam' (ability), questioning not your moral choice but your competence. For a warrior whose identity equals martial prowess, this hits the core. Krishna asks: what could be more painful? The teaching: distinguish mockery from 'ahitāḥ' (ill-wishers who don't know you) from critique by people you respect. Enemy mockery might mean you're on the right path. Mentor mockery means reconsider.