योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-82, verse-58

केवलं ज्ञत्वविषयमुपदेशार्थसिद्धये ।
त्वया करणभूतेन करोत्यात्मेति कथ्यते ॥ ५८ ॥

kevalaṃ jñatvaviṣayamupadeśārthasiddhaye ,
tvayā karaṇabhūtena karotyātmeti kathyate 58

58. kevalam jñatvaviṣayam upadeśārthasiddhaye |
tvayā karaṇabhūtena karoti ātmā iti kathyate

58. kevalam jñatvaviṣayam upadeśārthasiddhaye
tvayā karaṇabhūtena ātmā karoti iti kathyate

58. For the sole purpose of conveying instruction and making it understood, it is said that the self (ātman) acts through you, who are merely an instrument.

Words meanings summery:

• केवलम् (kevalam) - merely, solely, only

• ज्ञत्वविषयम् (jñatvaviṣayam) - a subject for knowing, regarding knowledge

• उपदेशार्थसिद्धये (upadeśārthasiddhaye) - for the sake of achieving the purpose of instruction

• त्वया (tvayā) - by you

• करणभूतेन (karaṇabhūtena) - being an instrument, having become an instrument

• करोति (karoti) - does, acts, makes

• आत्मा (ātmā) - the self (ātman) (the self, soul)

• इति (iti) - thus, in this manner, that (introduces direct/indirect speech)

• कथ्यते (kathyate) - it is said, it is told

Words meanings and morphology

केवलम् (kevalam) - merely, solely, only

(adjective)

Accusative, neuter, singular of kevala

kevala - sole, only, mere, exclusive

Note: Adverbial usage.

ज्ञत्वविषयम् (jñatvaviṣayam) - a subject for knowing, regarding knowledge

(noun)

Accusative, neuter, singular of jñatvaviṣaya

jñatvaviṣaya - a subject of knowledge, a matter to be known

Compound type : tatpuruṣa (jñatva+viṣaya)

• jñatva – the state of knowing, knowledge
  noun (neuter)
  Derived from jñā (to know) + -tva (suffix forming abstract nouns)
  Root: jñā (class 9)
• viṣaya – object, subject, sphere, domain
  noun (masculine)

Note: Object of implied instruction.

उपदेशार्थसिद्धये (upadeśārthasiddhaye) - for the sake of achieving the purpose of instruction

(noun)

Dative, feminine, singular of upadeśārthasiddhi

upadeśārthasiddhi - accomplishment of the purpose of instruction

Compound type : tatpuruṣa (upadeśa+artha+siddhi)

• upadeśa – instruction, teaching, advice
  noun (masculine)
  From upa-√diś
  Prefix: upa
  Root: diś (class 6)
• artha – purpose, meaning, object, wealth
  noun (masculine)
• siddhi – accomplishment, success, attainment
  noun (feminine)
  From √sidh
  Root: sidh (class 4)

Note: Purpose clause.

त्वया (tvayā) - by you

(pronoun)

Instrumental, singular of yuṣmad

yuṣmad - you

Note: Agent in passive construction ('kathyate') or instrument for 'karoti'.

करणभूतेन (karaṇabhūtena) - being an instrument, having become an instrument

(adjective)

Instrumental, masculine, singular of karaṇabhūta

karaṇabhūta - become an instrument, serving as an instrument

Compound type : tatpuruṣa (karaṇa+bhūta)

• karaṇa – instrument, means, cause
  noun (neuter)
  From √kṛ + ana
  Root: kṛ (class 8)
• bhūta – become, existed, a being, element
  adjective (masculine)
  Past Passive Participle
  Derived from root √bhū (to be, to become) + -ta suffix
  Root: bhū (class 1)

Note: Modifies 'tvayā'.

करोति (karoti) - does, acts, makes

(verb)

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

Present Tense, Active Voice

Root kṛ, 3rd person singular

Root: kṛ (class 8)

Note: The verb within the 'iti' clause.

आत्मा (ātmā) - the self (ātman) (the self, soul)

(noun)

Nominative, masculine, singular of ātman

ātman - self, soul, spirit, essential nature

Note: Subject of 'karoti'.

इति (iti) - thus, in this manner, that (introduces direct/indirect speech)

(indeclinable)

Note: Introduces the reported statement.

कथ्यते (kathyate) - it is said, it is told

(verb)

3rd person , singular, passive, present (laṭ) of kath

Present Tense, Passive Voice

Root kath (denominative from kathā), 3rd person singular

Root: kath (class 10)