योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-213, verse-21

यथायं त्वं सितोदान्तरेक एवादितः कचैः ।
तथा ब्रह्मैवमच्छात्म सर्गे सर्गक्षयेऽक्षयम् ॥ २१ ॥

yathāyaṃ tvaṃ sitodāntareka evāditaḥ kacaiḥ ,
tathā brahmaivamacchātma sarge sargakṣaye'kṣayam 21

21. yathā ayam tvam sitodāntarekaḥ eva āditaḥ kacaiḥ
tathā brahma evam acchātma sarge sargakṣaye akṣayam

21. yathā ayam tvam āditaḥ sitodāntarekaḥ eva kacaiḥ
tathā brahma evam acchātma sarge sargakṣaye akṣayam

21. Just as you, this individual (ayam tvam), are from the beginning (āditaḥ) one (ekaḥ eva), intrinsically pure and serene (sitodānta), and manifest through your own effulgence (kacaiḥ), so too is Brahman, whose nature (ātman) is pure, imperishable in both creation and dissolution.

Words meanings summery:

• यथा (yathā) - just as (as, just as, in what manner)

• अयम् (ayam) - this (individual) (this, he)

• त्वम् (tvam) - you (individual) (you (singular))

• सितोदान्तरेकः (sitodāntarekaḥ) - one, intrinsically pure and serene (one whose interior is like white water, pure and unique)

• एव (eva) - only / indeed (indeed, only, just)

• आदितः (āditaḥ) - from the beginning (from the beginning, primarily)

• कचैः (kacaiḥ) - through your own effulgence (by splendent qualities, by shining)

• तथा (tathā) - so too (so, thus, in that manner)

• ब्रह्म (brahma) - Brahman (Brahman, the Absolute)

• एवम् (evam) - thus (thus, in this way)

• अच्छात्म (acchātma) - whose nature (ātman) is pure (pure in nature, whose self is pure)

• सर्गे (sarge) - in creation (in creation, in emission)

• सर्गक्षये (sargakṣaye) - in dissolution (in dissolution of creation, in cessation of emanation)

• अक्षयम् (akṣayam) - imperishable (imperishable, undiminishing)

Words meanings and morphology

यथा (yathā) - just as (as, just as, in what manner)

(indeclinable)

Comparative adverb.

अयम् (ayam) - this (individual) (this, he)

(pronoun)

Nominative, masculine, singular of idam

idam - this, here, now

Note: Agrees with `tvam`.

त्वम् (tvam) - you (individual) (you (singular))

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you

Nominative singular of yuşmad

सितोदान्तरेकः (sitodāntarekaḥ) - one, intrinsically pure and serene (one whose interior is like white water, pure and unique)

(adjective)

Nominative, masculine, singular of sitodāntareka

sitodāntareka - one whose interior is like white water, pure and unique; pure-hearted, serene and one

Compound of sita (white/pure), uda (water), antara (interior/essence), eka (one/unique). Here it implies a state of being internally pure and singular, or pure and serene. udānta can also mean serene.

Compound type : bahuvrihi (sita+uda+antara+eka)

• sita – white, pure, clean
  adjective
  Past Passive Participle
  Past passive participle of √so 'to cleanse, purify'
  Root: so (class 4)
• uda – water
  noun (neuter)
  Root: und (class 7)
• antara – interior, essence, inner
  noun (neuter)
• eka – one, single, unique
  pronoun (masculine)
  Root: i (class 2)

एव (eva) - only / indeed (indeed, only, just)

(indeclinable)

Emphasizes the preceding word.

आदितः (āditaḥ) - from the beginning (from the beginning, primarily)

(indeclinable)

From ādi (beginning) + -tas (ablative suffix)

कचैः (kacaiḥ) - through your own effulgence (by splendent qualities, by shining)

(noun)

Instrumental, masculine, plural of kaca

kaca - shining, glittering, splendor, hair

From √kac 'to shine'

Root: kac (class 1)

तथा (tathā) - so too (so, thus, in that manner)

(indeclinable)

Correlative to yathā.

ब्रह्म (brahma) - Brahman (Brahman, the Absolute)

(noun)

Nominative, neuter, singular of brahman

brahman - Brahman, the Absolute, universal spirit

Neuter nominative singular of brahman, referring to the Absolute.

Root: bṛh (class 1)

एवम् (evam) - thus (thus, in this way)

(indeclinable)

Adverb.

अच्छात्म (acchātma) - whose nature (ātman) is pure (pure in nature, whose self is pure)

(adjective)

Nominative, neuter, singular of acchātman

acchātman - pure in nature, whose self is pure

Compound of accha (pure) and ātman (self/nature). Bahuvrihi compound. Agrees with `brahma`.

Compound type : bahuvrihi (accha+ātman)

• accha – pure, clear, transparent
  adjective
  From √śac 'to be pure'.
  Root: śac (class 1)
• ātman – self, soul, essence, (ātman)
  noun (masculine)
  Root: an (class 2)

सर्गे (sarge) - in creation (in creation, in emission)

(noun)

Locative, masculine, singular of sarga

sarga - creation, emission, release

From √sṛj 'to create, emit'

Root: sṛj (class 6)

सर्गक्षये (sargakṣaye) - in dissolution (in dissolution of creation, in cessation of emanation)

(noun)

Locative, masculine, singular of sargakṣaya

sargakṣaya - dissolution of creation, cessation of emanation

Tatpurusha compound: sarga (creation) + kṣaya (dissolution). Locative singular.

Compound type : tatpurusha (sarga+kṣaya)

• sarga – creation, emission
  noun (masculine)
  From √sṛj 'to create, emit'
  Root: sṛj (class 6)
• kṣaya – destruction, dissolution, decay
  noun (masculine)
  From √kṣi 'to destroy, waste'
  Root: kṣi (class 5)

अक्षयम् (akṣayam) - imperishable (imperishable, undiminishing)

(adjective)

Nominative, neuter, singular of akṣaya

akṣaya - imperishable, undiminishing

Negated kṣaya (decay/destruction) with 'a' prefix

Compound type : nañ-tatpuruṣa (a+kṣaya)

• a – not, non-, un-
  prefix
  Negation prefix
• kṣaya – destruction, dissolution, decay
  noun (masculine)
  From √kṣi 'to destroy, waste'
  Root: kṣi (class 5)