Shloka 17
कर्मयोग–ज्ञानयज्ञ–अवतारोपदेश
Karma-Yoga, Jñāna-Yajña, and Avatāra Instruction
अविनाशि तु तद् विद्धि येन सर्वमिदं ततम् । विनाशमव्ययस्यास्य न कश्रित् कर्तुमहति
avināśi tu tad viddhi yena sarvam idaṃ tatam | vināśam avyayasyāsya na kaścit kartum arhati ||
当知：遍满此一切世界者，乃不可毁坏。无人能令此不变不朽之实相灭亡。此教导使听者在战祸之前离于恐惧与哀伤，因为它以“内在之我不可伤害”的觉悟为根基，安立其本分。
संजय उवाच
Educational Q&A
The core teaching is that the reality which pervades all—understood as the Self (ātman) or imperishable principle—is indestructible; therefore, true being cannot be annihilated, and one should not be overwhelmed by fear or grief about destruction of the body.
In the Bhīṣma Parva’s Bhagavadgītā discourse, the instruction emphasizes the indestructibility of the inner Self to steady the warrior’s mind, so that he can act according to dharma without collapsing into sorrow or hesitation amid the impending battle.