योगवासिष्ठः yogavāsiṣṭhaḥ - book-5, chapter-29, verse-51

मा विषादं कृथा व्यर्थं सुखदुःखैषणा न ते ।
शुद्धचित्तोऽसि सर्वात्मा सर्ववस्त्ववभासकः ॥ ५१ ॥

mā viṣādaṃ kṛthā vyarthaṃ sukhaduḥkhaiṣaṇā na te ,
śuddhacitto'si sarvātmā sarvavastvavabhāsakaḥ 51

51. mā viṣādam kṛthāḥ vyartham sukhaduḥkhaiṣaṇā na te
śuddhacittaḥ asi sarvātmā sarvavastvavabhāsakaḥ

51. te sukhaduḥkhaiṣaṇā na vyartham mā viṣādam kṛthāḥ
śuddhacittaḥ asi sarvātmā sarvavastvavabhāsakaḥ

51. Do not lament in vain; the desire for pleasure and pain is not yours. You are pure consciousness, the Self (ātman) of all, the illuminator of all objects.

Words meanings summery:

• मा (mā) - not, do not

• विषादम् (viṣādam) - sorrow, grief, dejection

• कृथाः (kṛthāḥ) - do (not lament) (do, make)

• व्यर्थम् (vyartham) - uselessly, in vain, without purpose

• सुखदुःखैषणा (sukhaduḥkhaiṣaṇā) - desire for pleasure and pain

• न (na) - not, no

• ते (te) - yours (to you, for you, your)

• शुद्धचित्तः (śuddhacittaḥ) - of pure consciousness (pure-minded, of pure consciousness)

• असि (asi) - you are

• सर्वात्मा (sarvātmā) - the Self of all, the universal Self

• सर्ववस्त्ववभासकः (sarvavastvavabhāsakaḥ) - the illuminator of all objects, that which makes all objects manifest

Words meanings and morphology

मा (mā) - not, do not

(indeclinable)

विषादम् (viṣādam) - sorrow, grief, dejection

(noun)

Accusative, masculine, singular of viṣāda

viṣāda - sorrow, grief, dejection

Prefix: vi

Root: sad (class 1)

कृथाः (kṛthāḥ) - do (not lament) (do, make)

(verb)

2nd person , singular, middle, aorist (luṅ) of kṛ

Root: kṛ (class 8)

Note: Used with prohibitive particle mā

व्यर्थम् (vyartham) - uselessly, in vain, without purpose

(indeclinable)

Compound type : bahuvrihi (vi+artha)

• vi – without, opposite, apart
  indeclinable
• artha – purpose, meaning, wealth, object
  noun (masculine)

Note: Adverbial usage

सुखदुःखैषणा (sukhaduḥkhaiṣaṇā) - desire for pleasure and pain

(noun)

Nominative, feminine, singular of sukhaduḥkhaiṣaṇā

sukhaduḥkhaiṣaṇā - desire for pleasure and pain

Compound type : dvandva-tatpurusha (sukha+duḥkha+eṣaṇā)

• sukha – pleasure, happiness
  noun (neuter)
• duḥkha – pain, suffering
  noun (neuter)
• eṣaṇā – desire, seeking, longing
  noun (feminine)
  from root iṣ (to wish, desire)
  Root: iṣ (class 4)

Note: Compound of 'sukha' (pleasure), 'duḥkha' (pain) and 'eṣaṇā' (desire).

न (na) - not, no

(indeclinable)

ते (te) - yours (to you, for you, your)

(pronoun)

Genitive, singular of yuṣmad

yuṣmad - you (pronoun)

Note: Enclitic form of the second person pronoun

शुद्धचित्तः (śuddhacittaḥ) - of pure consciousness (pure-minded, of pure consciousness)

(adjective)

Nominative, masculine, singular of śuddhacitta

śuddhacitta - pure-minded, pure in heart

Compound type : bahuvrihi (śuddha+citta)

• śuddha – pure, clean, clear
  adjective (masculine)
  Past Passive Participle
  from root śudh
  Root: śudh (class 4)
• citta – mind, consciousness, thought
  noun (neuter)
  Root: cit (class 1)

असि (asi) - you are

(verb)

2nd person , singular, active, present (laṭ) of as

Root: as (class 2)

सर्वात्मा (sarvātmā) - the Self of all, the universal Self

(noun)

Nominative, masculine, singular of sarvātman

sarvātman - the universal Self, the Self of all

Compound type : karmadharaya (sarva+ātman)

• sarva – all, every, whole
  pronoun (masculine)
• ātman – Self, soul, essence, breath
  noun (masculine)

सर्ववस्त्ववभासकः (sarvavastvavabhāsakaḥ) - the illuminator of all objects, that which makes all objects manifest

(adjective)

Nominative, masculine, singular of sarvavastvavabhāsaka

sarvavastvavabhāsaka - illuminator of all objects

Compound type : tatpurusha (sarva+vastu+avabhāsaka)

• sarva – all, every, whole
  pronoun (masculine)
• vastu – object, thing, substance, reality
  noun (neuter)
• avabhāsaka – illuminator, one who causes to shine, perceiver
  noun (masculine)
  Agent noun
  from root bhās with prefix ava
  Prefix: ava
  Root: bhās (class 1)

Note: Often refers to consciousness as the illuminator of objects.