योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-62, verse-31

पौरुषैकात्मता श्रेयो मोक्षोऽत्यन्तमकर्तृता ।
आभ्यां तु सबलः पक्षो निर्दुःखैव महात्मनाम् ॥ ३१ ॥

pauruṣaikātmatā śreyo mokṣo'tyantamakartṛtā ,
ābhyāṃ tu sabalaḥ pakṣo nirduḥkhaiva mahātmanām 31

31. pauruṣaikātmatā śreyaḥ mokṣaḥ atyantam akartṛtā
ābhyām tu sabalaḥ pakṣaḥ nirduḥkhā eva mahātmanām

31. pauruṣaikātmatā śreyaḥ,
atyantam akartṛtā mokṣaḥ (ca).
tu,
ābhyām sabalaḥ pakṣaḥ mahātmanām nirduḥkhā eva.

31. Identification with self-effort (pauruṣa) is the supreme good, and ultimate non-agency (akartṛtā) is liberation (mokṣa). For great souls (mahātmanām), the path (pakṣa) strengthened by these two is indeed freedom from sorrow.

Words meanings summery:

• पौरुषैकात्मता (pauruṣaikātmatā) - oneness with self-effort, identity with personal exertion

• श्रेयः (śreyaḥ) - better, more excellent, supreme good, bliss

• मोक्षः (mokṣaḥ) - liberation, emancipation, freedom (mokṣa)

• अत्यन्तम् (atyantam) - extremely, utterly, absolutely, without end

• अकर्तृता (akartṛtā) - non-doership, non-agency, the state of being not a doer

• आभ्याम् (ābhyām) - referring to 'self-effort' and 'non-agency' (by these two, with these two)

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

• सबलः (sabalaḥ) - strong, powerful, strengthened, endowed with strength

• पक्षः (pakṣaḥ) - referring to the philosophical side or path (side, party, aspect, doctrine, path, argument)

• निर्दुःखा (nirduḥkhā) - implies a state or condition that is sorrowless (free from sorrow, sorrowless)

• एव (eva) - indeed, only, certainly, just

• महात्मनाम् (mahātmanām) - of great souls, of the magnanimous ones, of noble individuals

Words meanings and morphology

पौरुषैकात्मता (pauruṣaikātmatā) - oneness with self-effort, identity with personal exertion

(noun)

Nominative, feminine, singular of pauruṣaikātmatā

pauruṣaikātmatā - oneness with self-effort, identity with human exertion

Compound type : tatpurusha (pauruṣa+ekātmatā)

• pauruṣa – self-effort, human exertion, manliness, virility, personal endeavor (pauruṣa)
  noun (neuter)
• ekātmatā – oneness, identity, unity, sameness
  noun (feminine)

श्रेयः (śreyaḥ) - better, more excellent, supreme good, bliss

(adjective)

Nominative, neuter, singular of śreyas

śreyas - better, more excellent, supreme good, bliss, welfare

मोक्षः (mokṣaḥ) - liberation, emancipation, freedom (mokṣa)

(noun)

Nominative, masculine, singular of mokṣa

mokṣa - liberation, emancipation, freedom, release from saṃsāra (mokṣa)

Root: muc (class 6)

अत्यन्तम् (atyantam) - extremely, utterly, absolutely, without end

(indeclinable)

अकर्तृता (akartṛtā) - non-doership, non-agency, the state of being not a doer

(noun)

Nominative, feminine, singular of akartṛtā

akartṛtā - non-doership, non-agency, the state of being not a doer

Compound type : nah-tatpurusha (a+kartṛtā)

• a – not, non-, un-
  prefix
• kartṛtā – doership, agency, the state of being a doer
  noun (feminine)

आभ्याम् (ābhyām) - referring to 'self-effort' and 'non-agency' (by these two, with these two)

(pronoun)

Instrumental, dual of idam

idam - this, these

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

(indeclinable)

सबलः (sabalaḥ) - strong, powerful, strengthened, endowed with strength

(adjective)

Nominative, masculine, singular of sabala

sabala - strong, powerful, strengthened, endowed with strength

Compound type : bahuvrihi (sa+bala)

• sa – with, accompanied by
  prefix
• bala – strength, power, force
  noun (neuter)

पक्षः (pakṣaḥ) - referring to the philosophical side or path (side, party, aspect, doctrine, path, argument)

(noun)

Nominative, masculine, singular of pakṣa

pakṣa - side, wing, party, aspect, opinion, doctrine, argument, path

निर्दुःखा (nirduḥkhā) - implies a state or condition that is sorrowless (free from sorrow, sorrowless)

(adjective)

Nominative, feminine, singular of nirduḥkha

nirduḥkha - free from sorrow, sorrowless, happy

Compound type : nah-tatpurusha (nis+duḥkha)

• nis – out, forth, without, free from
  prefix
• duḥkha – suffering, pain, sorrow, misery
  noun (neuter)

Note: Although 'pakṣaḥ' is masculine, 'nirduḥkhā' (feminine) here acts as a predicate referring to an implied feminine noun like 'state' (avasthā) or 'condition' (gati).

एव (eva) - indeed, only, certainly, just

(indeclinable)

महात्मनाम् (mahātmanām) - of great souls, of the magnanimous ones, of noble individuals

(noun)

Genitive, masculine, plural of mahātman

mahātman - great-souled, magnanimous, noble; a great soul, a lofty individual

Compound type : karmadhāraya (mahā+ātman)

• mahā – great, large, mighty
  adjective
• ātman – self, soul, spirit, the individual soul (ātman)
  noun (masculine)