Īśāvāsyopaniṣat 06

yastu sarvāṇi bhūtāni ātmanyevānu paśyati। sarvabhūteṣu cātmānaṁ tato na vijugupsate ॥6॥

[यः (yaḥ): Whoever; तु (tu): But/However/ indeed; सर्वाणि (sarvāṇi): all; भूतानि (bhūtāni): beings or entities; आत्मनि (ātmani): in the supreme self; एव (eva): only or indeed; अनु (anu): after or along with; पश्यति (paśyati): viewes; सर्वभूतेषु (sarvabhūteṣu): in all beings; च (ca): and; आत्मानं (ātmānaṁ): the supreme self; ततः (tataḥ): then or therefore; न (na): not; विजुगुप्सते (vijugupsate): over protect / despise;]

Whoever, indeed, sees, all beings in the supreme self and the supreme self in every being, such a person does not try to protect himself, and does not despise.

Īśā.Bhāshya 06

The word 'ātma' here refers to supreme essence. The word 'vijugupsate' indicates without fear. Vedic testimonial from 'saukarāyaṇa' is quoted to substantiate the traditional understanding.

sarvagaṁ paramātmānaṁ sarvaṁ ca paramātmani। yaḥ paśyet sa bhayābhāvānnātmānaṁ goptumicchati॥

Whoever sees the all-pervading supreme self in all and all in the supreme self, that person, from the absence of fear, desires not to protect oneself.

iti saukarāyaṇaśrutiḥ ॥6॥

- states the 'saukarāyaṇa' Vedic testimonial.