योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-144, verse-18

वेदान्तार्थात्मकं पूर्वसर्गाभावं प्रवर्तते ।
ततो वेद्यव्यवस्था ज्ञैः क्रियते स्वार्थसिद्धये ॥ १८ ॥

vedāntārthātmakaṃ pūrvasargābhāvaṃ pravartate ,
tato vedyavyavasthā jñaiḥ kriyate svārthasiddhaye 18

18. vedāntārtha ātmakaṃ pūrva sarga abhāvaṃ pravartate
tataḥ vedya vyavasthā jñaiḥ kriyate svārtha siddhaye

18. vedāntārthātmakaṃ pūrvasargābhāvaṃ pravartate.
tataḥ jñaiḥ svārthasiddhaye vedyavyavasthā kriyate.

18. The absence of a prior creation (sarga), which embodies the essence of Vedantic meaning, is established (as a principle). Consequently, the wise establish the system of knowledge (vedya-vyavasthā) for the realization of their own ultimate purpose.

Words meanings summery:

• वेदान्तार्थात्मकं (vedāntārthātmakaṁ) - having the nature of the meaning of Vedanta, embodying the essence of Vedantic meaning

• पूर्वसर्गाभावं (pūrvasargābhāvaṁ) - the non-existence of prior creation (sarga), absence of a beginning to creation

• प्रवर्तते (pravartate) - proceeds, begins, is established, manifests

• ततः (tataḥ) - then, therefrom, consequently

• वेद्यव्यवस्था (vedyavyavasthā) - the arrangement of what is to be known, system of knowledge, distinction of knowables

• ज्ञैः (jñaiḥ) - by the wise, by those who know

• क्रियते (kriyate) - is made, is done, is established

• स्वार्थसिद्धये (svārthasiddhaye) - for the attainment of their own purpose

Words meanings and morphology

वेदान्तार्थात्मकं (vedāntārthātmakaṁ) - having the nature of the meaning of Vedanta, embodying the essence of Vedantic meaning

(adjective)

Nominative, neuter, singular of vedāntārthātmaka

vedāntārthātmaka - of the nature of Vedantic meaning, consisting of Vedantic truth

Compound type : tatpuruṣa (vedānta+artha+ātmaka)

• vedānta – the end of the Vedas, system of philosophy
  noun (masculine)
• artha – meaning, object, purpose, wealth
  noun (masculine)
• ātmaka – consisting of, having the nature of, relating to the self (ātman)
  suffix (adjective) (masculine)
  suffix added to form adjectives meaning 'composed of' or 'pertaining to'

पूर्वसर्गाभावं (pūrvasargābhāvaṁ) - the non-existence of prior creation (sarga), absence of a beginning to creation

(noun)

Nominative, neuter, singular of pūrvasargābhāva

pūrvasargābhāva - absence of a previous creation (sarga)

Compound type : tatpuruṣa (pūrva+sarga+abhāva)

• pūrva – previous, prior, former
  adjective (masculine)
• sarga – creation, emanation, chapter
  noun (masculine)
  Root: sṛj (class 6)
• abhāva – non-existence, absence, negation
  noun (masculine)
  Prefix: a
  Root: bhū (class 1)

प्रवर्तते (pravartate) - proceeds, begins, is established, manifests

(verb)

3rd person , singular, middle, present indicative (laṭ) of pravṛt

Prefix: pra

Root: vṛt (class 1)

ततः (tataḥ) - then, therefrom, consequently

(indeclinable)

वेद्यव्यवस्था (vedyavyavasthā) - the arrangement of what is to be known, system of knowledge, distinction of knowables

(noun)

Nominative, feminine, singular of vedyavyavasthā

vedyavyavasthā - system of knowledge, arrangement of things to be known, distinction of knowables

Compound type : tatpuruṣa (vedya+vyavasthā)

• vedya – to be known, knowable
  adjective (neuter)
  Gerundive
  formed from root vid with -ya suffix
  Root: vid (class 2)
• vyavasthā – arrangement, order, system, distinction
  noun (feminine)
  Prefixes: vi+ava
  Root: sthā (class 1)

ज्ञैः (jñaiḥ) - by the wise, by those who know

(noun)

Instrumental, masculine, plural of jñā

jñā - knowing, wise, knower, intelligent

from root jñā (to know)

Root: jñā (class 9)

क्रियते (kriyate) - is made, is done, is established

(verb)

3rd person , singular, passive, present indicative (laṭ) of kṛ

Root: kṛ (class 8)

स्वार्थसिद्धये (svārthasiddhaye) - for the attainment of their own purpose

(noun)

Dative, feminine, singular of svārthasiddhi

svārthasiddhi - attainment of one's own purpose/goal

Compound type : tatpuruṣa (sva+artha+siddhi)

• sva – own, one's own
  pronoun (masculine)
• artha – purpose, object, meaning, wealth
  noun (masculine)
• siddhi – attainment, accomplishment, perfection, success
  noun (feminine)
  Root: sidh (class 4)