Śakra–Namuci-saṃvāda: Śoka-nivāraṇa and Daiva-vicāra
Indra and Namuci on grief, composure, and inevitability
एतदाहुः समाहार क्षेत्रमध्यात्मचिन्तका: । स्थितो मनसि यो भाव: स वै क्षेत्रज्ञ उच्यते,अध्यात्मतत्त्वका चिन्तन करनेवाले विद्वान् इस शरीर और इन्द्रियोंके संघातको क्षेत्र कहते हैं और मनमें जो चेतन सत्ता स्थित है, वही क्षेत्रज्ञ (जीवात्मा) कहलाता है
etad āhuḥ samāhāraṃ kṣetram adhyātma-cintakāḥ | sthito manasi yo bhāvaḥ sa vai kṣetrajña ucyate ||
Bhishma said: Those who contemplate the truths of the inner Self declare that the aggregate—this body together with the senses—is the ‘field’ (kṣetra). The conscious principle that abides within the mind, the inner awareness that knows and illumines experience, is called the ‘knower of the field’ (kṣetrajña), the individual self.
भीष्म उवाच
The verse distinguishes between the ‘field’ (kṣetra)—the composite of body and senses—and the ‘knower of the field’ (kṣetrajña)—the conscious principle that experiences and knows. Ethical clarity arises from not confusing the changing body-mind with the witnessing self.
In the Shanti Parva’s instruction on dharma and inner knowledge, Bhishma teaches Yudhishthira a philosophical framework: defining the body-sense complex as the arena of experience and identifying the indwelling consciousness as the true knower.