नैनं छिन्दन्ति शस्त्राणि नैनं दहति पावकः | न चैनं क्लेदयन्त्यापो न शोषयति मारुतः ||
Nainam chindanti shastrani
Weapons cannot cut the soul, fire cannot burn it, water cannot wet it, and wind cannot dry it.
Modern Application: Your true self is beyond all physical harm.
Deep Wisdom: Krishna emphasizes the invincibility of the soul — it is beyond all physical elements.