योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-103, verse-18

अस्मिन्नेव धियो यत्न आत्मज्ञानविचारणे ।
यत्नेन परमोऽभ्यासः स लोकद्वयसिद्धिदः ॥ १८ ॥

asminneva dhiyo yatna ātmajñānavicāraṇe ,
yatnena paramo'bhyāsaḥ sa lokadvayasiddhidaḥ 18

18. asmin eva dhiyaḥ yatnaḥ ātmajñānavicāraṇe
yatnena paramaḥ abhyāsaḥ sa lokadvayasiddhidaḥ

18. asmin eva ātmajñānavicāraṇe dhiyaḥ yatnaḥ
yatnena paramaḥ abhyāsaḥ sa lokadvayasiddhidaḥ

18. Indeed, the intellect's (dhi) primary effort should be directed towards the inquiry into the knowledge of the Self (ātmajñāna). Through diligent effort, supreme practice (abhyāsa) is attained, and that (practice) grants success in both realms.

Words meanings summery:

• अस्मिन् (asmin) - in this

• एव (eva) - indeed, only, certainly

• धियः (dhiyaḥ) - the intellect's (dhi) (of the intellect, of the mind)

• यत्नः (yatnaḥ) - effort, endeavor, exertion

• आत्मज्ञानविचारणे (ātmajñānavicāraṇe) - in the inquiry into self-knowledge

• यत्नेन (yatnena) - by effort, through endeavor

• परमः (paramaḥ) - supreme, highest, excellent

• अभ्यासः (abhyāsaḥ) - supreme practice (abhyāsa) (practice, repetition, study, habituation)

• स (sa) - that, he

• लोकद्वयसिद्धिदः (lokadvayasiddhidaḥ) - granting success in both worlds

Words meanings and morphology

अस्मिन् (asmin) - in this

(pronoun)

Locative, masculine/neuter, singular of idam

idam - this

एव (eva) - indeed, only, certainly

(indeclinable)

धियः (dhiyaḥ) - the intellect's (dhi) (of the intellect, of the mind)

(noun)

Genitive, feminine, singular of dhi

dhi - intellect, understanding, mind, thought, wisdom

यत्नः (yatnaḥ) - effort, endeavor, exertion

(noun)

Nominative, masculine, singular of yatna

yatna - effort, exertion, endeavor, attempt

Root: yat (class 1)

आत्मज्ञानविचारणे (ātmajñānavicāraṇe) - in the inquiry into self-knowledge

(noun)

Locative, neuter, singular of ātmajñānavicāraṇa

ātmajñānavicāraṇa - inquiry into self-knowledge

Compound type : ṣaṣṭhī-tatpuruṣa (ātman+jñāna+vicāraṇa)

• ātman – self, soul, spirit, essence
  noun (masculine)
• jñāna – knowledge, wisdom, understanding
  noun (neuter)
  Root: jñā (class 9)
• vicāraṇa – inquiry, investigation, deliberation, consideration
  noun (neuter)
  Noun derived from vi-√car.
  Prefix: vi
  Root: car (class 1)

यत्नेन (yatnena) - by effort, through endeavor

(noun)

Instrumental, masculine, singular of yatna

yatna - effort, exertion, endeavor, attempt

Root: yat (class 1)

परमः (paramaḥ) - supreme, highest, excellent

(adjective)

Nominative, masculine, singular of parama

parama - highest, supreme, excellent, ultimate

अभ्यासः (abhyāsaḥ) - supreme practice (abhyāsa) (practice, repetition, study, habituation)

(noun)

Nominative, masculine, singular of abhyāsa

abhyāsa - practice, repetition, study, habituation, exercise

Noun derived from abhi-ā-√as.

Prefixes: abhi+ā

Root: as (class 4)

स (sa) - that, he

(pronoun)

Nominative, masculine, singular of tad

tad - that, he, she, it

लोकद्वयसिद्धिदः (lokadvayasiddhidaḥ) - granting success in both worlds

(adjective)

Nominative, masculine, singular of lokadvayasiddhida

lokadvayasiddhida - giving success in both worlds

Compound type : tatpuruṣa (loka+dvaya+siddhi+da)

• loka – world, realm, people
  noun (masculine)
• dvaya – pair, two, twofold
  noun (neuter)
• siddhi – accomplishment, success, perfection, supernatural power
  noun (feminine)
  Root: sidh (class 4)
• da – giving, granting, bestowing
  adjective
  Agent noun/suffix
  Derived from the root √dā (to give).
  Root: dā (class 3)