योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-83, verse-15

स्वभावाच्चेतनं तस्माद्रुद्रत्वेन तथा स्थितम् ।
हेमेव रूपकत्वेन संनिवेशविलासिना ॥ १५ ॥

svabhāvāccetanaṃ tasmādrudratvena tathā sthitam ,
hemeva rūpakatvena saṃniveśavilāsinā 15

15. svabhāvāt cetanam tasmāt rudratvena tathā
sthitam hema iva rūpakatvena saṃniveśavilāsinā

15. tasmāt cetanam svabhāvāt rudratvena tathā sthitam
yathā hema saṃniveśavilāsinā rūpakatvena iva (sthitam)

15. Therefore, consciousness (cetana), by its intrinsic nature (svabhāva), exists as Rudra, just as gold exists as an ornament (rūpaka) through its charming form or arrangement.

Words meanings summery:

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

• चेतनम् (cetanam) - consciousness, the conscious one

• तस्मात् (tasmāt) - therefore, from that

• रुद्रत्वेन (rudratvena) - by means of being Rudra, as Rudra

• तथा (tathā) - similarly, so, thus

• स्थितम् (sthitam) - situated, existing, established

• हेम (hema) - gold

• इव (iva) - like, as, as if

• रूपकत्वेन (rūpakatvena) - by means of being an ornament, as an ornament/figure

• संनिवेशविलासिना (saṁniveśavilāsinā) - describing the ornament's attractive composition (by means of charming arrangement, by the one delighting in arrangement/composition)

Words meanings and morphology

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

(noun)

Ablative, masculine, singular of svabhāva

svabhāva - one's own state or nature, intrinsic nature, essential quality

Compound type : tatpuruṣa (sva+bhāva)

• sva – own, one's own
  pronoun (masculine)
• bhāva – state of being, nature, existence, disposition
  noun (masculine)
  Root: bhū (class 1)

चेतनम् (cetanam) - consciousness, the conscious one

(noun)

Nominative, neuter, singular of cetana

cetana - conscious, animate, sentient; consciousness, intellect

Derived from the root cit (to perceive, understand) with the ana suffix.

Root: cit (class 1)

तस्मात् (tasmāt) - therefore, from that

(indeclinable)

रुद्रत्वेन (rudratvena) - by means of being Rudra, as Rudra

(noun)

Instrumental, neuter, singular of rudratva

rudratva - the state or nature of being Rudra

Compound type : tatpuruṣa (rudra+tva)

• rudra – Rudra (a Vedic deity, an epithet of Śiva)
  proper noun (masculine)
• tva – suffix for abstract nouns, '-ness', '-hood'
  suffix (neuter)

तथा (tathā) - similarly, so, thus

(indeclinable)

स्थितम् (sthitam) - situated, existing, established

(adjective)

Nominative, neuter, singular of sthita

sthita - standing, situated, existing, firm, established

Past Passive Participle

Derived from the root sthā (to stand) with the kta suffix.

Root: sthā (class 1)

हेम (hema) - gold

(noun)

Nominative, neuter, singular of heman

heman - gold

इव (iva) - like, as, as if

(indeclinable)

रूपकत्वेन (rūpakatvena) - by means of being an ornament, as an ornament/figure

(noun)

Instrumental, neuter, singular of rūpakatva

rūpakatva - the state or quality of being an ornament, an allegory, or a figure

Compound type : tatpuruṣa (rūpaka+tva)

• rūpaka – form, image, ornament, metaphor, allegory
  noun (neuter)
• tva – suffix for abstract nouns, '-ness', '-hood'
  suffix (neuter)

संनिवेशविलासिना (saṁniveśavilāsinā) - describing the ornament's attractive composition (by means of charming arrangement, by the one delighting in arrangement/composition)

(adjective)

Instrumental, masculine, singular of saṃniveśavilāsin

saṁniveśavilāsin - charming in its arrangement, delighting in composition

Compound type : tatpuruṣa (saṃniveśa+vilāsin)

• saṃniveśa – arrangement, composition, disposition, form, artistic creation
  noun (masculine)
  Derived from root viś (to enter) with prefixes sam and ni.
  Prefixes: sam+ni
  Root: viś (class 6)
• vilāsin – charming, graceful, sportive, delighting in
  adjective (masculine)
  Agent Noun/Adjective
  Derived from root las (to shine, sport) with prefix vi, and -in suffix.
  Prefix: vi
  Root: las (class 1)

Note: Qualifies the 'rūpaka' (ornament) implicitly, explaining its characteristic.