अच्छेद्योऽयमदाह्योऽयमक्लेद्योऽशोष्य एव च ।नित्यः सर्वगतः स्थाणुरचलोऽयं सनातनः ॥
acchedyo'yamadāhyo'yamakledyo'śoṣya eva ca |nityaḥ sarvagataḥ sthāṇuracalo'yaṃ sanātanaḥ ||
This self cannot be cut, burned, drenched or dried. It is eternal, all-pervading, stable, unmoving and everlasting.
Explanation
Krishna continues comforting Arjuna, who is grieving at the thought of killing his kin in battle. He describes the self (ātman), the inner witness and conscious core of a being, as beyond harm by any element and as eternal (nitya) and unchanging. Traditions differ on "all-pervading": Advaita reads it as the self being one with Brahman and so present everywhere, while Vishishtadvaita and Dvaita take it to mean that each individual self, though distinct from God, can enter every kind of body.