योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-100, verse-21

नास्ति चित्तमिति ज्ञानात्तत्समूलं विनश्यति ।
यथा रज्ज्वां भुजङ्गत्वमज्ञानभ्रमसंभवम् ॥ २१ ॥

nāsti cittamiti jñānāttatsamūlaṃ vinaśyati ,
yathā rajjvāṃ bhujaṅgatvamajñānabhramasaṃbhavam 21

21. na asti cittam iti jñānāt tat samūlam vinaśyati
yathā rajjvām bhujaṅgatvam ajñāna-bhrama-saṃbhavam

21. yathā rajjvām ajñāna-bhrama-saṃbhavam bhujaṅgatvam (na asti sarpaḥ iti jñānāt vinaśyati),
(tathā) cittam na asti iti jñānāt tat samūlam vinaśyati

21. Just as the perception of a snake in a rope, born from the delusion of ignorance (ajñāna), is utterly destroyed by the knowledge that 'there is no snake,' so too, by the knowledge 'the mind (citta) does not exist,' that (mind) vanishes completely, along with its very root.

Words meanings summery:

• न (na) - not, no

• अस्ति (asti) - is, exists, there is

• चित्तम् (cittam) - mind, consciousness, thought

• इति (iti) - thus, marking direct speech or thought

• ज्ञानात् (jñānāt) - from knowledge, by knowledge

• तत् (tat) - the mind (citta) (that, it)

• समूलम् (samūlam) - along with its fundamental cause or origin (with its root, utterly, entirely)

• विनश्यति (vinaśyati) - it perishes, it vanishes, it is destroyed

• यथा (yathā) - just as, as, in which way

• रज्ज्वाम् (rajjvām) - in the rope

• भुजङ्गत्वम् (bhujaṅgatvam) - the illusion of a snake (the state or quality of being a snake, snake-ness)

• अज्ञान-भ्रम-संभवम् (ajñāna-bhrama-saṁbhavam) - born from the delusion of ignorance, caused by the error of non-knowledge

Words meanings and morphology

न (na) - not, no

(indeclinable)

अस्ति (asti) - is, exists, there is

(verb)

3rd person , singular, active, present (laṭ) of as

Present tense, 3rd person singular.

Root: as (class 2)

चित्तम् (cittam) - mind, consciousness, thought

(noun)

Nominative, neuter, singular of citta

citta - mind, thought, intellect, consciousness

Past Passive Participle of cit 'to perceive, observe'

Derived from root cit.

Root: cit (class 1)

Note: The object of the 'iti' clause, "the mind does not exist."

इति (iti) - thus, marking direct speech or thought

(indeclinable)

ज्ञानात् (jñānāt) - from knowledge, by knowledge

(noun)

Ablative, neuter, singular of jñāna

jñāna - knowledge, wisdom, understanding

Root: jñā (class 9)

तत् (tat) - the mind (citta) (that, it)

(pronoun)

Nominative, neuter, singular of tad

tad - that, it, he, she

Note: Refers to 'cittam'.

समूलम् (samūlam) - along with its fundamental cause or origin (with its root, utterly, entirely)

(adjective)

Nominative, neuter, singular of samūla

samūla - with roots, root and all, utterly, entirely

Compound.

Compound type : sa-bahuvrīhi (sa+mūla)

• sa – with, together with
  indeclinable
  Prefix meaning 'with'.
• mūla – root, basis, origin, foundation
  noun (neuter)

Note: Functions adverbially.

विनश्यति (vinaśyati) - it perishes, it vanishes, it is destroyed

(verb)

3rd person , singular, active, present (laṭ) of vi-naś

Present tense, 3rd person singular.

Prefix: vi

Root: naś (class 4)

यथा (yathā) - just as, as, in which way

(indeclinable)

रज्ज्वाम् (rajjvām) - in the rope

(noun)

Locative, feminine, singular of rajju

rajju - rope, cord, string

भुजङ्गत्वम् (bhujaṅgatvam) - the illusion of a snake (the state or quality of being a snake, snake-ness)

(noun)

Nominative, neuter, singular of bhujaṅgatva

bhujaṅgatva - snake-ness, the state of being a snake

Derived from bhujaṅga (snake) with suffix -tva (abstract noun).

Compound type : tatpuruṣa (bhujaṅga+tva)

• bhujaṅga – snake, serpent
  noun (masculine)
  'moving by means of arms' (bhuja-ga).
  Root: gam (class 1)
• tva – -ness, -hood (suffix forming abstract nouns)
  noun suffix (neuter)
  Forms abstract neuter nouns.

अज्ञान-भ्रम-संभवम् (ajñāna-bhrama-saṁbhavam) - born from the delusion of ignorance, caused by the error of non-knowledge

(adjective)

Nominative, neuter, singular of ajñāna-bhrama-saṃbhava

ajñāna-bhrama-saṁbhava - born from the delusion of ignorance (ajñāna), originating from the error of nescience

Tatpuruṣa compound.

Compound type : tatpuruṣa (ajñāna+bhrama+saṃbhava)

• ajñāna – ignorance (ajñāna), nescience
  noun (neuter)
  From a + jñāna.
  Prefix: a
  Root: jñā (class 9)
• bhrama – delusion, error, mistake, illusion
  noun (masculine)
  From root bhram 'to wander, err'.
  Root: bhram (class 1)
• saṃbhava – birth, origin, production, arising from
  noun (masculine)
  From sam + bhū.
  Prefix: sam
  Root: bhū (class 1)

Note: Qualifies 'bhujaṅgatvam'.