Udyoga-parva Adhyāya 71 — Kṣatra-dharma Counsel, Public Legitimacy, and Mobilization
न जातु गमनं पार्थ भवेत् तत्र निरर्थकम् । अर्थप्राप्ति: कदाचित् स्यादन्ततो वाप्यवाच्यता
na jātu gamanaṁ pārtha bhavet tatra nirarthakam | arthaprāptiḥ kadācit syād antato vāpy avācyatā | ataḥ kuntīnandana mama tatra yānaṁ kadāpi nirarthakaṁ na bhaviṣyati | sambhavaḥ, tatra mamābhīṣṭārthasya siddhir bhavet; yadi kāryaṁ na sidhyet, tathāpi vayaṁ nindāto rakṣiṣyāmaḥ |
হে পার্থ! সেখানে আমার গমন কখনোই নিরর্থক হবে না। সম্ভবত অভীষ্ট উদ্দেশ্য সিদ্ধ হবে; আর যদি কাজ না-ও হয়, তবু অন্তত আমরা নিন্দার ঊর্ধ্বে থাকব।
युधिछिर उवाच
One should undertake a righteous effort even when success is uncertain: it may achieve the goal, and even if it fails, the doer remains ethically blameless for having tried the proper course.
Yudhiṣṭhira addresses Arjuna, insisting that a proposed journey/mission is not futile: it could secure their intended outcome, and failing that, it still protects them from public and moral reproach for neglecting due effort.