B.G 2.30
dehī nityamavadhyo'yaṃ dehe sarvasya bhārata। tasmāt sarvāṇi bhūtāni na tvaṃ śocitumarhasi ॥2-30॥
O Bharata, this embodied being stationed in this body, is everlasting and indestructible everywhere. Therefore, you should not grieve for any creature.
Gīta Tātparya 2.30
The being is eternal because of the Lord, not because of his own capacity
dehī kutaḥ avadhyaḥ? yasmādayamīśvaraḥ sarvasya jīvasya sūkṣme sthūle ca dehe rakṣakatvena avasthitaḥ ata eva avadhyaḥ. na svasāmarthyaṃ kasyāpi.
How is the embodied indestructible? The Lord of all beings stations Himself as the protector of the subtle and gross bodies. Hence, it is indestructible, not because of its own strength at any given time.
"dravyaṁ karma ca kālaśca svabhāvo jīva eva ca। yadanugrahataḥ santi na santi yadapekṣayā॥"
"The substance, the movement, the time; the essential nature, the being - all these exist because of his grace and cease to exist if he shows reluctance."
-iti hi bhāgavate।
-states Bhāgavata Purana.
"tatra tatra sthito viṣṇuḥ nityaṃ rakṣati nityadā। anityadaivānityaṃ ca nityānitye tatastataḥ। bhāvābhāvaniyantā hi tadekaḥ puruṣottamaḥ॥"
"Lord Vishnu stations himself there and there, and protects the eternals as eternal. Similarly, He keeps the non-eternal entities as non eternal. Thus, eternal and non-eternals come into being. As he controls the existent and non-existent, he is called best among the beings."
-iti pādme।
- thus states Padma Purāna