योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-49, verse-8

आत्मा त्वाद्यन्तमध्येषु समः सर्वत्र सर्वदा ।
स्वमप्यन्यत्वमायाति नात्मतत्त्वं कदाचन ॥ ८ ॥

ātmā tvādyantamadhyeṣu samaḥ sarvatra sarvadā ,
svamapyanyatvamāyāti nātmatattvaṃ kadācana 8

8. ātmā tu ādyantamadhyeṣu samaḥ sarvatra sarvadā
svam api anyatvam āyāti na ātmatattvam kadācana

8. tu ātmā ādyantamadhyeṣu sarvatra sarvadā samaḥ
svam api anyatvam āyāti ātmatattvam kadācana na

8. However, the self (ātman) remains uniform everywhere and always, throughout its beginning, middle, and end. Even one's perceived individual self (sva) undergoes transformation, but the true essence of the self (ātmatattva) never changes.

Words meanings summery:

• आत्मा (ātmā) - the self (ātman), soul, spirit, individual self

• तु (tu) - but, indeed, however, on the other hand

• आद्यन्तमध्येषु (ādyantamadhyeṣu) - in the beginning, middle, and end; in all three stages

• समः (samaḥ) - same, equal, uniform, identical

• सर्वत्र (sarvatra) - everywhere, in all places

• सर्वदा (sarvadā) - always, at all times

• स्वम् (svam) - one's perceived individual self, as opposed to the universal ātman (one's own (perceived) self, one's property)

• अपि (api) - also, even, too

• अन्यत्वम् (anyatvam) - difference, otherness, alteration

• आयाति (āyāti) - attains, reaches, undergoes, comes to

• न (na) - not, no, nor

• आत्मतत्त्वम् (ātmatattvam) - the reality/essence of the self (ātman), the true nature of the self (ātman)

• कदाचन (kadācana) - never, at no time, ever (with negation)

Words meanings and morphology

आत्मा (ātmā) - the self (ātman), soul, spirit, individual self

(noun)

Nominative, masculine, singular of ātman

ātman - self (ātman), soul, spirit, essence, ego

तु (tu) - but, indeed, however, on the other hand

(indeclinable)

आद्यन्तमध्येषु (ādyantamadhyeṣu) - in the beginning, middle, and end; in all three stages

(noun)

Locative, masculine, plural of ādyantamadhya

ādyantamadhya - beginning, middle, and end

Compound type : Dvandva (ādi+anta+madhya)

• ādi – beginning, start, origin
  noun (masculine)
• anta – end, limit, boundary
  noun (masculine)
• madhya – middle, center
  noun (neuter)

समः (samaḥ) - same, equal, uniform, identical

(adjective)

Nominative, masculine, singular of sama

sama - same, equal, identical, uniform, unchanged

सर्वत्र (sarvatra) - everywhere, in all places

(indeclinable)

Locative adverb derived from 'sarva' (all).

सर्वदा (sarvadā) - always, at all times

(indeclinable)

Temporal adverb derived from 'sarva' (all).

स्वम् (svam) - one's perceived individual self, as opposed to the universal ātman (one's own (perceived) self, one's property)

(noun)

Nominative, neuter, singular of sva

sva - one's own, self, own people, property, wealth

अपि (api) - also, even, too

(indeclinable)

अन्यत्वम् (anyatvam) - difference, otherness, alteration

(noun)

Nominative, neuter, singular of anyatva

anyatva - difference, otherness, distinctness, alteration

Derived from 'anya' (other) with the suffix 'tva' (abstract noun).

आयाति (āyāti) - attains, reaches, undergoes, comes to

(verb)

3rd person , singular, active, present indicative (laṭ) of yā

present tense, active voice

Root of Class 2, Parasmaipada (active voice). With prefix 'ā'.

Prefix: ā

Root: yā (class 2)

न (na) - not, no, nor

(indeclinable)

आत्मतत्त्वम् (ātmatattvam) - the reality/essence of the self (ātman), the true nature of the self (ātman)

(noun)

Nominative, neuter, singular of ātmatattva

ātmatattva - the true nature of the self (ātman), the reality of the self (ātman)

Compound type : Tatpuruṣa (ātman+tattva)

• ātman – self (ātman), soul, spirit
  noun (masculine)
• tattva – reality, essence, truth, principle, true nature
  noun (neuter)

कदाचन (kadācana) - never, at no time, ever (with negation)

(indeclinable)