योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-15, verse-8

संतोषशीतलं चेतः शुद्धविज्ञानदृष्टिभिः ।
भृशं विकासमायाति सूर्यांशुभिरिवाम्बुजम् ॥ ८ ॥

saṃtoṣaśītalaṃ cetaḥ śuddhavijñānadṛṣṭibhiḥ ,
bhṛśaṃ vikāsamāyāti sūryāṃśubhirivāmbujam 8

8. santoṣaśītalam cetaḥ śuddhavijñānadṛṣṭibhiḥ
bhṛśam vikāsam āyāti sūryāṃśubhiḥ iva ambujam

8. santoṣaśītalam cetaḥ śuddhavijñānadṛṣṭibhiḥ
bhṛśam vikāsam āyāti sūryāṃśubhiḥ iva ambujam

8. The mind (cetas), cooled by contentment (santoṣa), expands greatly through the vision of pure wisdom (vijñāna), just as a lotus blossoms by the sun's rays.

Words meanings summery:

• सन्तोषशीतलम् (santoṣaśītalam) - cool/calm due to contentment

• चेतः (cetaḥ) - mind, consciousness, intellect

• शुद्धविज्ञानदृष्टिभिः (śuddhavijñānadṛṣṭibhiḥ) - by visions of pure knowledge/wisdom

• भृशम् (bhṛśam) - greatly, exceedingly, intensely

• विकासम् (vikāsam) - expansion, blossoming, development

• आयाति (āyāti) - attains (expansion), blossoms (comes, approaches, attains)

• सूर्यांशुभिः (sūryāṁśubhiḥ) - by sunbeams, by sun's rays

• इव (iva) - like, as

• अम्बुजम् (ambujam) - lotus (literally, "water-born")

Words meanings and morphology

सन्तोषशीतलम् (santoṣaśītalam) - cool/calm due to contentment

(adjective)

Nominative, neuter, singular of santoṣaśītala

santoṣaśītala - cooled by contentment

Compound type : tatpuruṣa (santoṣa+śītala)

• santoṣa – contentment, satisfaction
  noun (masculine)
  derived from root tuṣ 'to be pleased' with prefix sam
  Prefix: sam
  Root: tuṣ (class 4)
• śītala – cool, cold, calm, placid
  adjective (neuter)

Note: agrees with cetas

चेतः (cetaḥ) - mind, consciousness, intellect

(noun)

Nominative, neuter, singular of cetas

cetas - mind, intellect, consciousness, heart

Root: cit (class 1)

शुद्धविज्ञानदृष्टिभिः (śuddhavijñānadṛṣṭibhiḥ) - by visions of pure knowledge/wisdom

(noun)

Instrumental, feminine, plural of śuddhavijñānadṛṣṭi

śuddhavijñānadṛṣṭi - vision of pure knowledge

Compound type : tatpuruṣa (śuddha+vijñāna+dṛṣṭi)

• śuddha – pure, clean, clear
  adjective (masculine)
  Past Passive Participle
  derived from root śudh 'to purify'
  Root: śudh (class 4)
• vijñāna – special knowledge, wisdom, understanding
  noun (neuter)
  derived from root jñā 'to know' with prefix vi
  Prefix: vi
  Root: jñā (class 9)
• dṛṣṭi – sight, vision, view, insight
  noun (feminine)
  derived from root dṛś 'to see'
  Root: dṛś (class 1)

भृशम् (bhṛśam) - greatly, exceedingly, intensely

(indeclinable)

विकासम् (vikāsam) - expansion, blossoming, development

(noun)

Accusative, masculine, singular of vikāsa

vikāsa - expansion, blossoming, manifestation

derived from root kaś 'to shine' with prefix vi

Prefix: vi

Root: kaś (class 1)

आयाति (āyāti) - attains (expansion), blossoms (comes, approaches, attains)

(verb)

3rd person , singular, active, present (laṭ) of āyā

present active third person singular

Prefix: ā

Root: yā (class 2)

सूर्यांशुभिः (sūryāṁśubhiḥ) - by sunbeams, by sun's rays

(noun)

Instrumental, masculine, plural of sūryāṃśu

sūryāṁśu - sunbeam, sun's ray

Compound type : tatpuruṣa (sūrya+aṃśu)

• sūrya – sun
  noun (masculine)
• aṃśu – ray, beam of light
  noun (masculine)

इव (iva) - like, as

(indeclinable)

अम्बुजम् (ambujam) - lotus (literally, "water-born")

(noun)

Nominative, neuter, singular of ambuja

ambuja - lotus (water-born)

Compound type : upapada tatpuruṣa (ambas+ja)

• ambas – water
  noun (neuter)
• ja – born, produced from
  adjective (neuter)
  derived from root jan 'to be born'
  Root: jan (class 4)