Shloka 12
Adhyāya 353 — Kathā-prāmāṇya (Authority of Transmission) and the Brāhmaṇa’s Ascetic Resolve
अचिन्त्यं चापि त॑ ज्ञात्वा भावसूक्ष्मं चतुष्टयम् । विचरेद् यो5समुन्नद्ध: स गच्छेत् पुरुषं शुभम्
acintyaṃ cāpi taṃ jñātvā bhāvasūkṣmaṃ catuṣṭayam | vicared yo 'samunnaddhaḥ sa gacchet puruṣaṃ śubham ||
毗湿摩说道：“知彼至上普鲁沙不可思议（acintya），并洞察内在四种微细之性向；若有人行于世而不自矜自大、无我慢膨胀，则能证得那吉祥的至上普鲁沙。”
पितामह उवाच
Educational Q&A
The verse teaches that the Supreme Reality (Puruṣa) is ultimately inconceivable, yet one should cultivate refined inner dispositions (a subtle fourfold set) and live without ego-inflation; such humility and inner discipline lead to attaining the auspicious Supreme Person.
In Śānti Parva, Bhīṣma instructs Yudhiṣṭhira on dharma and liberation-oriented conduct. Here he summarizes a soteriological point: recognizing the transcendence of the Supreme and practicing ego-free living grounded in subtle inner cultivation results in reaching the highest good.