योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-91, verse-54

देहोऽयमेष च किलायमिति स्वभावाद्देहोऽयमेतदखिलं तत एति नाशम् ।
यक्षादिकल्पनवशाद्भयमेति बालो निर्यक्षदेहगत एव कयापि युक्त्या ॥ ५४ ॥

deho'yameṣa ca kilāyamiti svabhāvāddeho'yametadakhilaṃ tata eti nāśam ,
yakṣādikalpanavaśādbhayameti bālo niryakṣadehagata eva kayāpi yuktyā 54

54. dehaḥ ayam eṣa ca kila ayam iti svabhāvāt
dehaḥ ayam etat akhilam tataḥ eti
nāśam yakṣādikalpanavaśāt bhayam eti bālaḥ
niryakṣadehagataḥ eva kayā api yuktyā

54. ayam dehaḥ eṣa ca kila ayam iti svabhāvāt.
ayam dehaḥ etat akhilam [asti iti].
tataḥ nāśam eti.
yakṣādikalpanavaśāt bālaḥ bhayam eti,
niryakṣadehagataḥ eva kayā api yuktyā.

54. By its very nature (svabhāva), this body (deha) is identified as 'this and verily this.' As this body (deha) is considered the whole (akhilam) of existence, it is therefore subject to destruction (nāśam). Just as a child (bālaḥ) experiences fear (bhayam) merely through imagining (kalpana) a yakṣa (spirit) or similar entities, even though they are inherently free (niryakṣa) from such a spirit entering the body (deha), by some inexplicable means (yukti).

Words meanings summery:

• देहः (dehaḥ) - body, physical form

• अयम् (ayam) - this, this one

• एष (eṣa) - this, this one (more emphatic than 'ayam')

• च (ca) - and, also

• किल (kila) - verily, emphasizing certainty (indeed, certainly, as it were)

• अयम् (ayam) - this, this one

• इति (iti) - thus, so, indicating a statement or thought

• स्वभावात् (svabhāvāt) - by nature, from its own nature, inherently

• देहः (dehaḥ) - body, physical form

• अयम् (ayam) - this, this one

• एतत् (etat) - this, this one

• अखिलम् (akhilam) - the whole of existence (entire, whole, all)

• ततः (tataḥ) - therefore, thence, from that

• एति (eti) - it is subject to (it goes, it obtains, it reaches)

• नाशम् (nāśam) - destruction, ruin, disappearance

• यक्षादिकल्पनवशात् (yakṣādikalpanavaśāt) - due to the power of imagination of yakṣas and the like

• भयम् (bhayam) - fear, dread

• एति (eti) - he experiences (he goes, he experiences, he obtains)

• बालः (bālaḥ) - child, ignorant person, simpleton

• निर्यक्षदेहगतः (niryakṣadehagataḥ) - inherently free from such a spirit entering the body (one who is situated in a body free from yakṣas, not possessed by a yakṣa)

• एव (eva) - indeed, certainly, only

• कया (kayā) - by some (implied) means (by what, by which)

• अपि (api) - some (inexplicable) (even, also, some (when combined with interrogative))

• युक्त्या (yuktyā) - by some inexplicable means (by means, by a reason, by a stratagem)

Words meanings and morphology

देहः (dehaḥ) - body, physical form

(noun)

Nominative, masculine, singular of deha

deha - body, physical form, embodiment

अयम् (ayam) - this, this one

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one, that which is near

एष (eṣa) - this, this one (more emphatic than 'ayam')

(pronoun)

Nominative, masculine, singular of etad

etad - this, this one (often more immediate or present than 'idam')

च (ca) - and, also

(indeclinable)

किल (kila) - verily, emphasizing certainty (indeed, certainly, as it were)

(indeclinable)

अयम् (ayam) - this, this one

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one, that which is near

इति (iti) - thus, so, indicating a statement or thought

(indeclinable)

स्वभावात् (svabhāvāt) - by nature, from its own nature, inherently

(noun)

Ablative, masculine, singular of svabhāva

svabhāva - own state or nature, inherent disposition, essential property

Compound of sva (own) and bhāva (state of being)

Compound type : tatpurusha (sva+bhāva)

• sva – own, self
  adjective
• bhāva – state of being, nature, existence, emotion
  noun (masculine)
  Derived from √bhū (to be, become)
  Root: bhū (class 1)

देहः (dehaḥ) - body, physical form

(noun)

Nominative, masculine, singular of deha

deha - body, physical form, embodiment

अयम् (ayam) - this, this one

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one, that which is near

एतत् (etat) - this, this one

(pronoun)

Nominative, neuter, singular of etad

etad - this, this one (often more immediate or present than 'idam')

अखिलम् (akhilam) - the whole of existence (entire, whole, all)

(adjective)

Nominative, neuter, singular of akhila

akhila - entire, whole, complete, faultless (lit. without a gap or defect)

Compound of 'a' (neg. prefix) and 'khila' (gap, space, defect)

ततः (tataḥ) - therefore, thence, from that

(indeclinable)

एति (eti) - it is subject to (it goes, it obtains, it reaches)

(verb)

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

Root: i (class 2)

नाशम् (nāśam) - destruction, ruin, disappearance

(noun)

Accusative, masculine, singular of nāśa

nāśa - destruction, ruin, perishing, loss

Derived from √naś (to perish)

Root: naś (class 4)

यक्षादिकल्पनवशात् (yakṣādikalpanavaśāt) - due to the power of imagination of yakṣas and the like

(noun)

Ablative, masculine, singular of yakṣādikalpanavaśa

yakṣādikalpanavaśa - control or power (vaśa) arising from imagination (kalpana) of yakṣas (spirits) etc.

Compound type : tatpurusha (yakṣa+ādi+kalpana+vaśa)

• yakṣa – a class of supernatural beings, a spirit, often associated with nature
  noun (masculine)
• ādi – beginning, etcetera, and so on
  indeclinable
• kalpana – imagination, conception, creation, mental construction
  noun (feminine)
  Derived from √kḷp (to be able, to arrange, to create)
  Root: kḷp (class 10)
• vaśa – power, control, influence, will
  noun (masculine)

भयम् (bhayam) - fear, dread

(noun)

Accusative, neuter, singular of bhaya

bhaya - fear, dread, apprehension

Derived from √bhī (to fear)

Root: bhī (class 3)

एति (eti) - he experiences (he goes, he experiences, he obtains)

(verb)

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

Root: i (class 2)

बालः (bālaḥ) - child, ignorant person, simpleton

(noun)

Nominative, masculine, singular of bāla

bāla - child, young boy, ignorant person, simpleton

निर्यक्षदेहगतः (niryakṣadehagataḥ) - inherently free from such a spirit entering the body (one who is situated in a body free from yakṣas, not possessed by a yakṣa)

(adjective)

Nominative, masculine, singular of niryakṣadehagata

niryakṣadehagata - one who has gone (gata) into a body (deha) that is without (nis) a yakṣa

Compound type : bahuvrihi (nis+yakṣa+deha+gata)

• nis – without, out, away
  indeclinable
  Prefix indicating negation or absence
• yakṣa – a class of supernatural beings, a spirit
  noun (masculine)
• deha – body, physical form
  noun (masculine)
• gata – gone, arrived, situated in, past
  adjective (masculine)
  Past Passive Participle
  From √gam (to go)
  Root: gam (class 1)

एव (eva) - indeed, certainly, only

(indeclinable)

कया (kayā) - by some (implied) means (by what, by which)

(pronoun)

Instrumental, feminine, singular of kim

kim - who, what, which (interrogative pronoun)

अपि (api) - some (inexplicable) (even, also, some (when combined with interrogative))

(indeclinable)

युक्त्या (yuktyā) - by some inexplicable means (by means, by a reason, by a stratagem)

(noun)

Instrumental, feminine, singular of yukti

yukti - means, method, reason, argument, stratagem, skill

Derived from √yuj (to join, connect, apply)

Root: yuj (class 7)