Bhagavad Gita, Chapter 18, Verse 20

सर्वभूतेषु येनैकं भावमव्ययमीक्षते । अविभक्तं विभक्तेषु तज्ज्ञानं विद्धि सात्त्विकम्

sarvabhūteṣu yenaikaṃ bhāvamavyayamīkṣate | avibhaktaṃ vibhakteṣu tajjñānaṃ viddhi sāttvikam

Translation

That by which a man sees the one Indestructible Reality in all beings, inseparate in the separated — that knowledge know thou as Sāttvic.

— Alladi Mahadeva Sastri

Word meanings

sarvabhūteṣu

in all beings

yena

by which

ekam

one

bhāvam

being

avyayam

indestructible

īkṣate

sees

avibhaktam

inseparate

vibhakteṣu

in the separate

tat

that

jñānam

wisdom

viddhi

know

sāttvikam

sāttvic

Śaṅkarācārya's commentary

Reality (Bhāva): the one Self. Indestructible: Kūṭastha, immutable. All beings: from Avyakta down to the sthāvara. That Reality, the Self, is not different in different bodies; like the ākāśa, the Self admits of no division. Know thou this direct and right perception of the non-dual Self as Sāttvic.