योगवासिष्ठः yogavāsiṣṭhaḥ - book-4, chapter-18, verse-31

आकाशविशदं ब्रह्म यत्नेनापि न लभ्यते ।
दृश्ये दृश्यतया दृष्टे त्वस्य लाभः सुदूरतः ॥ ३१ ॥

ākāśaviśadaṃ brahma yatnenāpi na labhyate ,
dṛśye dṛśyatayā dṛṣṭe tvasya lābhaḥ sudūrataḥ 31

31. ākāśaviśadam brahma yatnena api na labhyate
dṛśye dṛśyatayā dṛṣṭe tu asya lābhaḥ sudūrataḥ

31. ākāśaviśadam brahma yatnena api na labhyate.
tu dṛśye dṛśyatayā dṛṣṭe,
asya lābhaḥ sudūrataḥ.

31. Brahman, which is pure as space, is not attained even with effort. But when the perceptible world (dṛśya) is perceived merely as an object, then the attainment of this (brahman) is extremely remote.

Words meanings summery:

• आकाशविशदम् (ākāśaviśadam) - pure as space (clear as space, pure as the sky)

• ब्रह्म (brahma) - the Absolute Reality (brahman) (Brahman, the Absolute Reality)

• यत्नेन (yatnena) - with effort (by effort, with exertion)

• अपि (api) - even (even, also, although)

• न (na) - not (not, no)

• लभ्यते (labhyate) - is attained (is obtained, is attained, is found)

• दृश्ये (dṛśye) - in the perceptible world (in the visible, when seen, in the object of sight)

• दृश्यतया (dṛśyatayā) - merely as perceptible, in its nature as an object of perception (by the state of being visible, as perceptibility)

• दृष्टे (dṛṣṭe) - when it is seen, is perceived (when seen, having been seen, observed)

• तु (tu) - but (but, on the other hand, indeed)

• अस्य (asya) - its (referring to Brahman) (of this, its)

• लाभः (lābhaḥ) - attainment, realization (attainment, acquisition, gain, profit)

• सुदूरतः (sudūrataḥ) - extremely remote (from a great distance, very far away, extremely remote)

Words meanings and morphology

आकाशविशदम् (ākāśaviśadam) - pure as space (clear as space, pure as the sky)

(adjective)

Nominative, neuter, singular of ākāśaviśada

ākāśaviśada - clear as space, pure as the sky

Compound type : tatpuruṣa (ākāśa+viśada)

• ākāśa – space, ether, sky
  noun (masculine)
• viśada – clear, pure, white, bright
  adjective (masculine)

Note: Agrees with brahma.

ब्रह्म (brahma) - the Absolute Reality (brahman) (Brahman, the Absolute Reality)

(noun)

Nominative, neuter, singular of brahman

brahman - Brahman, the Absolute, universal spirit

Root: bṛh (class 1)

Note: Subject of labhyate.

यत्नेन (yatnena) - with effort (by effort, with exertion)

(noun)

Instrumental, masculine, singular of yatna

yatna - effort, exertion, endeavor

Root: yat (class 1)

अपि (api) - even (even, also, although)

(indeclinable)

न (na) - not (not, no)

(indeclinable)

लभ्यते (labhyate) - is attained (is obtained, is attained, is found)

(verb)

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

present indicative

passive voice, root labh, 1st conjugation

Root: labh (class 1)

दृश्ये (dṛśye) - in the perceptible world (in the visible, when seen, in the object of sight)

(noun)

Locative, neuter, singular of dṛśya

dṛśya - visible, perceptible, object of sight

gerundive/future passive participle

derived from root dṛś with suffix -ya

Root: dṛś (class 1)

Note: Used in a locative absolute construction.

दृश्यतया (dṛśyatayā) - merely as perceptible, in its nature as an object of perception (by the state of being visible, as perceptibility)

(noun)

Instrumental, feminine, singular of dṛśyatā

dṛśyatā - visibility, perceptibility, the state of being visible

derived from dṛśya with suffix -tā (abstract noun)

Note: by means of its perceptibility.

दृष्टे (dṛṣṭe) - when it is seen, is perceived (when seen, having been seen, observed)

(adjective)

Locative, neuter, singular of dṛṣṭa

dṛṣṭa - seen, observed, perceived

Past Passive Participle

derived from root dṛś

Root: dṛś (class 1)

Note: Forms a locative absolute phrase with dṛśye.

तु (tu) - but (but, on the other hand, indeed)

(indeclinable)

अस्य (asya) - its (referring to Brahman) (of this, its)

(pronoun)

Genitive, neuter, singular of idam

idam - this

लाभः (lābhaḥ) - attainment, realization (attainment, acquisition, gain, profit)

(noun)

Nominative, masculine, singular of lābha

lābha - gain, acquisition, attainment, profit

from root labh

Root: labh (class 1)

Note: Subject of an implied verb 'is'.

सुदूरतः (sudūrataḥ) - extremely remote (from a great distance, very far away, extremely remote)

(indeclinable)

derived from sudūra (very distant) with suffix -tas

Note: Modifies the idea of attainment.