योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-43, verse-57

विद्युद्विलसिताकारमस्थिरं तरलायते ।
त्वं मनस्कारमात्रात्मा संसृतौ विभ्रमायसे ॥ ५७ ॥

vidyudvilasitākāramasthiraṃ taralāyate ,
tvaṃ manaskāramātrātmā saṃsṛtau vibhramāyase 57

57. vidyut-vilasita-ākāram asthiram taralāyate |
tvam manaskāra-mātra-ātmā saṃsṛtau vibhramāyase

57. (etat) vidyut-vilasita-ākāram asthiram taralāyate
tvam manaskāra-mātra-ātmā saṃsṛtau vibhramāyase

57. It (the mind or experience) flickers unstably, like the form of a flash of lightning. You, whose essential nature (ātman) is merely mental activity, create delusion in the cycle of existence (saṃsāra).

Words meanings summery:

• विद्युत्-विलसित-आकारम् (vidyut-vilasita-ākāram) - having the form of a flash of lightning

• अस्थिरम् (asthiram) - unsteady, unstable, flickering, transient

• तरलायते (taralāyate) - flickers, becomes agitated, trembles

• त्वम् (tvam) - you

• मनस्कार-मात्र-आत्मा (manaskāra-mātra-ātmā) - whose essential nature is merely mental activity

• संसृतौ (saṁsṛtau) - in the cycle of transmigration, in saṃsāra

• विभ्रमायसे (vibhramāyase) - you become deluded, you cause delusion

Words meanings and morphology

विद्युत्-विलसित-आकारम् (vidyut-vilasita-ākāram) - having the form of a flash of lightning

(adjective)

Nominative, neuter, singular of vidyut-vilasita-ākāra

vidyut-vilasita-ākāra - having the appearance of a flash of lightning

Compound type : bahuvrīhi (vidyut+vilasita+ākāra)

• vidyut – lightning, electricity
  noun (feminine)
• vilasita – flashed, gleamed, manifested, sported
  adjective (neuter)
  past passive participle
  Past passive participle of root 'las' with prefix 'vi'.
  Prefix: vi
  Root: las (class 1)
• ākāra – form, shape, appearance, aspect
  noun (masculine)

Note: Agrees with an implied subject (e.g., mind or its experience).

अस्थिरम् (asthiram) - unsteady, unstable, flickering, transient

(adjective)

Nominative, neuter, singular of asthira

asthira - unsteady, unstable, flickering, transient, not firm

Formed with negative prefix 'a-' from 'sthira' (steady).

Compound type : nañ-tatpuruṣa (a+sthira)

• a – not, non-, un-
  indeclinable
• sthira – steady, firm, stable, constant
  adjective (neuter)
  Root: sthā (class 1)

Note: Agrees with an implied subject (e.g., mind or its experience).

तरलायते (taralāyate) - flickers, becomes agitated, trembles

(verb)

3rd person , singular, middle, present (lat) of taralāya

present middle indicative, denominative

Denominative verb from the adjective 'tarala' (flickering, agitated), 3rd person singular, present tense, middle voice.

त्वम् (tvam) - you

(pronoun)

Nominative, singular of tvam

yuṣmad - you (singular)

मनस्कार-मात्र-आत्मा (manaskāra-mātra-ātmā) - whose essential nature is merely mental activity

(noun)

Nominative, masculine, singular of manaskāra-mātra-ātman

manaskāra-mātra-ātman - one whose nature is solely mental activity

Compound type : bahuvrīhi (manaskāra+mātra+ātman)

• manaskāra – mental activity, attention, thought
  noun (masculine)
  Prefix: manas
  Root: kṛ (class 8)
• mātra – mere, only, simply
  adjective (neuter)
• ātman – Self, soul, essential nature
  noun (masculine)
  Root: an (class 2)

संसृतौ (saṁsṛtau) - in the cycle of transmigration, in saṃsāra

(noun)

Locative, feminine, singular of saṃsṛti

saṁsṛti - cycle of rebirth, transmigration, saṃsāra

Prefix: sam

Root: sṛ (class 1)

विभ्रमायसे (vibhramāyase) - you become deluded, you cause delusion

(verb)

2nd person , singular, middle, present (lat) of vibhramāya

present middle indicative, denominative

Denominative verb from the noun 'vibhrama' (delusion, confusion), 2nd person singular, present tense, middle voice.

Prefix: vi

Root: bhram (class 1)