योगवासिष्ठः yogavāsiṣṭhaḥ - book-6, chapter-39, verse-41

आकस्मिकोपयातेन स्थितेनानियतेन च ।
भोगाभोगैकभोगेन प्राप्तेनात्मानमर्चयेत् ॥ ४१ ॥

ākasmikopayātena sthitenāniyatena ca ,
bhogābhogaikabhogena prāptenātmānamarcayet 41

41. ākasmikopayātena sthitena aniyatena ca
bhogābhogaikabhogena prāptena ātmānam arcayet

41. ekaḥ ākasmikopayātena sthitena aniyatena ca
bhogābhogaikabhogena prāptena ātmānam arcayet

41. One should worship the self (ātman) by means of what comes unexpectedly, what is established, what is unregulated, and by the sole experience encompassing both enjoyment and non-enjoyment, by whatever has been obtained.

Words meanings summery:

• आकस्मिकोपयातेन (ākasmikopayātena) - by that which comes unexpectedly, by that which has arrived by chance

• स्थितेन (sthitena) - by what is established, by what is existing, by what is firm

• अनियतेन (aniyatena) - by what is unregulated, by what is unfixed, by what is uncertain

• च (ca) - and, also

• भोगाभोगैकभोगेन (bhogābhogaikabhogena) - by the sole experience of enjoyment and non-enjoyment

• प्राप्तेन (prāptena) - by that which has been obtained, by what is attained, by what is reached

• आत्मानम् (ātmānam) - the self, the soul, the essence

• अर्चयेत् (arcayet) - one should worship, one should honor, one should revere

Words meanings and morphology

आकस्मिकोपयातेन (ākasmikopayātena) - by that which comes unexpectedly, by that which has arrived by chance

(adjective)

Instrumental, neuter, singular of ākasmikopayāta

ākasmikopayāta - that which has come unexpectedly or by chance

Compound type : karmadhāraya (ākasmika+upayāta)

• ākasmika – accidental, casual, unexpected
  adjective (masculine)
• upayāta – come, arrived, approached
  adjective (masculine)
  Past Passive Participle
  Derived from root 'yā' (to go) with upasarga 'upa'
  Prefix: upa
  Root: yā (class 2)

स्थितेन (sthitena) - by what is established, by what is existing, by what is firm

(adjective)

Instrumental, neuter, singular of sthita

sthita - standing, situated, existing, firm, established, permanent

Past Passive Participle

Derived from root 'sthā' (to stand)

Root: sthā (class 1)

अनियतेन (aniyatena) - by what is unregulated, by what is unfixed, by what is uncertain

(adjective)

Instrumental, neuter, singular of aniyata

aniyata - unregulated, unrestrained, unfixed, uncertain, not constant

Past Passive Participle (negative compound)

Negative compound (na + niyata); niyata from root 'yam' with upasarga 'ni'

Compound type : nañ-tatpuruṣa (na+niyata)

• na – not, no
  indeclinable
• niyata – regulated, fixed, controlled, constant
  adjective (masculine)
  Past Passive Participle
  Derived from root 'yam' (to restrain, control) with upasarga 'ni'
  Prefix: ni
  Root: yam (class 1)

च (ca) - and, also

(indeclinable)

भोगाभोगैकभोगेन (bhogābhogaikabhogena) - by the sole experience of enjoyment and non-enjoyment

(noun)

Instrumental, neuter, singular of bhogābhogaikabhoga

bhogābhogaikabhoga - single experience of enjoyment and non-enjoyment; sole experience of the range of enjoyments

Compound type : bahuvrīhi or tatpuruṣa (bhoga+abhoga+eka+bhoga)

• bhoga – enjoyment, experience, possession, gratification
  noun (masculine)
  Root: bhuj (class 7)
• abhoga – non-enjoyment, absence of experience, non-possession, or extent/range (of enjoyment)
  noun (masculine)
  Prefix: a
  Root: bhuj (class 7)
• eka – one, single, sole, unique
  numeral (masculine)
• bhoga – enjoyment, experience, possession, gratification
  noun (masculine)
  Root: bhuj (class 7)

प्राप्तेन (prāptena) - by that which has been obtained, by what is attained, by what is reached

(adjective)

Instrumental, neuter, singular of prāpta

prāpta - obtained, gained, reached, acquired

Past Passive Participle

Derived from root 'āp' (to obtain) with upasarga 'pra'

Prefix: pra

Root: āp (class 5)

आत्मानम् (ātmānam) - the self, the soul, the essence

(noun)

Accusative, masculine, singular of ātman

ātman - self, soul, essence, breath (ātman)

अर्चयेत् (arcayet) - one should worship, one should honor, one should revere

(verb)

3rd person , singular, active, optative (vidhiliṅ) of arc

Root: arc (class 1)