अमृतं चैव मृत्युश्च द्वयं देहे प्रतेष्ठितम्
amṛtaṃ caiva mṛtyuś ca dvayaṃ dehe pratiṣṭhitam
Bhīṣma said: “Both immortality and death are established together within the body.” In ethical terms, embodied life holds within it the conditions for liberation (the ‘deathless’) as well as the inevitability of physical death; one’s conduct and understanding determine which aspect becomes spiritually decisive.
भीष्म उवाच
The body is the locus of a dual truth: it is subject to death, yet it can also be the field in which one realizes the deathless (amṛta) through right understanding and disciplined living.
In Śānti Parva’s instruction section, Bhīṣma continues advising on higher dharma and inner knowledge, framing embodied existence as containing both mortality and the possibility of attaining the imperishable.