योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-106, verse-51

चिदाकाशप्रकाशेन चित्ता दृश्यपिशाचकः ।
वेतालो बालकेनेव बुद्धोऽसन्नेव सन्निव ॥ ५१ ॥

cidākāśaprakāśena cittā dṛśyapiśācakaḥ ,
vetālo bālakeneva buddho'sanneva sanniva 51

51. cit-ākāśa-prakāśena cittā dṛśya-piśācakaḥ
vetālaḥ bālakena iva buddhaḥ asan eva san iva

51. cit-ākāśa-prakāśena cittā dṛśya-piśācakaḥ
bālakena vetālaḥ iva buddhaḥ asan eva san iva

51. By the light of the ether of consciousness, that perceived (illusion/māyā) which is the ghost-demon of the visible world (dṛśyam), appears like a vetāla (demon) to a child. Though understood to be non-existent, it (still) seems as if it exists.

Words meanings summery:

• चित्-आकाश-प्रकाशेन (cit-ākāśa-prakāśena) - by the light of the ether of consciousness

• चित्ता (cittā) - referring to the illusion (māyā) from the previous verse, as that which is perceived. (perceived, known, understood)

• दृश्य-पिशाचकः (dṛśya-piśācakaḥ) - the ghost-demon of the visible/seen

• वेतालः (vetālaḥ) - Vetāla (a type of demon or ghost)

• बालकेन (bālakena) - by a child, by a boy

• इव (iva) - like, as, as it were

• बुद्धः (buddhaḥ) - understood, known, awakened

• असन् (asan) - being non-existent, not existing

• एव (eva) - only, indeed, just

• सन् (san) - being, existing

• इव (iva) - like, as, as it were

Words meanings and morphology

चित्-आकाश-प्रकाशेन (cit-ākāśa-prakāśena) - by the light of the ether of consciousness

(noun)

Instrumental, masculine, singular of cit-ākāśa-prakāśa

cit-ākāśa-prakāśa - the light or illumination of the consciousness-ether

Compound of 'cit' (consciousness), 'ākāśa' (ether), and 'prakāśa' (light).

Compound type : tatpuruṣa (cit+ākāśa+prakāśa)

• cit – consciousness, intelligence
  noun (feminine)
• ākāśa – ether, space, sky
  noun (masculine)
  Prefix: ā
  Root: kāś (class 1)
• prakāśa – light, splendor, manifestation, appearance
  noun (masculine)
  Prefix: pra
  Root: kāś (class 1)

चित्ता (cittā) - referring to the illusion (māyā) from the previous verse, as that which is perceived. (perceived, known, understood)

(participle)

Nominative, feminine, singular of citta

citta - perceived, known, understood; thought, mind, intellect

Past Passive Participle

Derived from root `cit` (to perceive, know, observe) with suffix `kta`.

Root: cit (class 1)

Note: Implicitly refers to 'māyā' or 'bhrānti' (illusion/delusion) mentioned previously.

दृश्य-पिशाचकः (dṛśya-piśācakaḥ) - the ghost-demon of the visible/seen

(noun)

Nominative, masculine, singular of dṛśya-piśācaka

dṛśya-piśācaka - the ghost-demon of the seen or visible (dṛśyam)

Compound of 'dṛśya' (visible, seen) and 'piśācaka' (ghost, demon).

Compound type : tatpuruṣa (dṛśya+piśācaka)

• dṛśya – visible, to be seen, perceptible
  participle
  Gerundive
  Root: dṛś (class 1)
• piśācaka – a type of demon, ghost, goblin
  noun (masculine)

वेतालः (vetālaḥ) - Vetāla (a type of demon or ghost)

(noun)

Nominative, masculine, singular of vetāla

vetāla - a ghost, goblin, demon (especially one animating a corpse)

बालकेन (bālakena) - by a child, by a boy

(noun)

Instrumental, masculine, singular of bālaka

bālaka - child, boy, youth

इव (iva) - like, as, as it were

(indeclinable)

बुद्धः (buddhaḥ) - understood, known, awakened

(participle)

Nominative, masculine, singular of buddha

buddha - awakened, enlightened, known, understood

Past Passive Participle

Derived from root `budh` (to know, awaken).

Root: budh (class 1)

Note: Agrees with an implied subject (the illusion/māyā).

असन् (asan) - being non-existent, not existing

(participle)

Nominative, masculine, singular of asat

asat - non-existent, unreal, false, bad

Present Participle (negative)

Negative form of `sat` (being, existing). Compound of 'a' (not) and 'sat'.

Compound type : tatpuruṣa (a+sat)

• a – not, non-, un-
  indeclinable
• sat – being, existing, real, good
  participle
  Present Participle
  Root: as (class 2)

Note: Agrees with an implied subject (the illusion/māyā).

एव (eva) - only, indeed, just

(indeclinable)

सन् (san) - being, existing

(participle)

Nominative, masculine, singular of sat

sat - being, existing, real, true, good

Present Participle

Derived from root `as` (to be).

Root: as (class 2)

Note: Agrees with an implied subject (the illusion/māyā).

इव (iva) - like, as, as it were

(indeclinable)