राजधर्मप्रश्नः — Yudhiṣṭhira’s Inquiry into Rājadharma (Śānti-parva 56)
दुर्गेषु च महाराज षट्सु ये शास्त्रनिश्चिता: । सर्वदुर्गेषु मन्यन्ते नरदुर्ग सुदुस्तरम्
durgeṣu ca mahārāja ṣaṭsu ye śāstra-niścitāḥ | sarva-durgeṣu manyante nara-durgaṃ sudustaram ||
ビーシュマは言った。「大王よ、シャーストラの定説に通暁する者たちは、城塞には六種があると説く。そのすべての中で、『人の城塞』—すなわち人々によって成り立つ防衛—こそ最も攻略しがたいと見なすのである。」
भीष्म उवाच
Effective defense and security ultimately depend most on people—trained, loyal, and organized human resources—more than on terrain or physical fortifications; hence the ‘human fortress’ is deemed the most formidable.
In the Śānti Parva’s instruction on kingship, Bhīṣma advises the king on principles of governance and protection of the realm, citing śāstric classifications of fortresses and emphasizing the superiority of manpower-based defense.