योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-83, verse-27

असति त्वयि सर्वाशिन्सर्वाशाक्षयसंक्षये ।
पक्षयोरेतयोश्चित्तसत्तासत्तास्वरूपयोः ॥ २७ ॥

asati tvayi sarvāśinsarvāśākṣayasaṃkṣaye ,
pakṣayoretayościttasattāsattāsvarūpayoḥ 27

27. asati tvayi sarvāśin sarvāśākṣayasaṃkṣaye
pakṣayoḥ etayoḥ cittasattāsattāsvarūpayoḥ

27. sarvāśin tvayi asati sarvāśākṣayasaṃkṣaye
etayoḥ pakṣayoḥ cittasattāsattāsvarūpayoḥ

27. O all-consuming one (mind), when you are non-existent – in that state of the complete annihilation of all desires – then these two aspects become clear: the nature of the mind's existence and its non-existence.

Words meanings summery:

• असति (asati) - in the non-existent, when non-existent, in the absence of

• त्वयि (tvayi) - in you, when you are

• सर्वाशिन् (sarvāśin) - O all-consuming mind (O all-consuming one, O all-devouring one)

• सर्वाशाक्षयसंक्षये (sarvāśākṣayasaṁkṣaye) - in the complete destruction of the destruction of all desires, in the utter annihilation of all desires/hopes

• पक्षयोः (pakṣayoḥ) - in the two aspects, on the two sides

• एतयोः (etayoḥ) - of these two, in these two

• चित्तसत्तासत्तास्वरूपयोः (cittasattāsattāsvarūpayoḥ) - having the nature of the mind's existence and non-existence

Words meanings and morphology

असति (asati) - in the non-existent, when non-existent, in the absence of

(adjective)

Locative, neuter, singular of asat

asat - non-existent, unreal, unmanifested

Prefix: a

Root: as (class 2)

त्वयि (tvayi) - in you, when you are

(pronoun)

Locative, singular of tvam

tvam - you

सर्वाशिन् (sarvāśin) - O all-consuming mind (O all-consuming one, O all-devouring one)

(adjective)

Vocative, masculine, singular of sarvāśin

sarvāśin - all-consuming, all-devouring, omnivorous

Derived from sarva (all) + āśin (eating, consuming).

Compound type : tatpuruṣa (sarva+āśin)

• sarva – all, every, whole
  adjective (neuter)
• āśin – eating, consuming, devouring
  adjective (masculine)
  agent noun
  Derived from the root aś (to eat) with the suffix -in.
  Root: aś (class 5)

Note: Refers to the mind (citta) in this context.

सर्वाशाक्षयसंक्षये (sarvāśākṣayasaṁkṣaye) - in the complete destruction of the destruction of all desires, in the utter annihilation of all desires/hopes

(noun)

Locative, masculine, singular of sarvāśākṣayasaṃkṣaya

sarvāśākṣayasaṁkṣaya - complete destruction of the destruction of all desires/hopes

Compound type : tatpuruṣa (sarvāśā+kṣaya+saṃkṣaya)

• sarvāśā – all hopes, all desires
  noun (feminine)
• kṣaya – destruction, cessation, decay, loss
  noun (masculine)
  Root: kṣi (class 1)
• saṃkṣaya – complete destruction, annihilation, total cessation
  noun (masculine)
  Prefix: sam
  Root: kṣi (class 1)

पक्षयोः (pakṣayoḥ) - in the two aspects, on the two sides

(noun)

Locative, masculine, dual of pakṣa

pakṣa - side, wing, aspect, party, fortnight

एतयोः (etayoḥ) - of these two, in these two

(pronoun)

Locative, masculine, dual of etad

etad - this, these

Note: Agrees with 'pakṣayoḥ'.

चित्तसत्तासत्तास्वरूपयोः (cittasattāsattāsvarūpayoḥ) - having the nature of the mind's existence and non-existence

(adjective)

Locative, masculine, dual of cittasattāsattāsvarūpa

cittasattāsattāsvarūpa - nature of the mind's existence and non-existence

Compound type : tatpuruṣa (citta+sattā+asattā+svarūpa)

• citta – mind, consciousness, thought
  noun (neuter)
  Root: cit (class 1)
• sattā – existence, being, reality, essence
  noun (feminine)
  Root: as (class 2)
• asattā – non-existence, non-being, unreality
  noun (feminine)
  Prefix: a
  Root: as (class 2)
• svarūpa – one's own form, true nature, intrinsic nature
  noun (neuter)

Note: This compound adjective describes the two 'aspects' (pakṣayoḥ).