One verse

Srimad Bhagavatam 12.5.8

12.5.8

न तत्रात्मा स्वयंज्योतिर्यो व्यक्ताव्यक्तयो: पर: । आकाश इव चाधारो ध्रुवोऽनन्तोपमस्तत: ॥ ८ ॥

na tatrātmā svayaṁ-jyotir yo vyaktāvyaktayoḥ paraḥ ākāśa iva cādhāro dhruvo ’nantopamas tataḥ

na
not
tatra
there
ātmā
the soul
svayam-jyotiḥ
self-luminous
yaḥ
who
vyakta-avyaktayoḥ
from the manifest and the unmanifest (the gross and subtle bodies)
paraḥ
different
ākāśaḥ
the sky
iva
as
ca
and
ādhāraḥ
the basis
dhruvaḥ
fixed
ananta
without end
upamaḥ
or comparison
tataḥ
thus

The soul within the body is self-luminous and is separate from the visible gross body and invisible subtle body. It remains as the fixed basis of changing bodily existence, just as the ethereal sky is the unchanging background of material transformation. Therefore the soul is endless and without material comparison.