योगवासिष्ठः yogavāsiṣṭhaḥ - book-2, chapter-6, verse-30

व्यवहारसहस्राणि यान्युपायान्ति यान्ति च ।
यथाशास्त्रं विहर्तव्यं तेषु त्यक्त्वा सुखासुखे ॥ ३० ॥

vyavahārasahasrāṇi yānyupāyānti yānti ca ,
yathāśāstraṃ vihartavyaṃ teṣu tyaktvā sukhāsukhe 30

30. vyavahāra-sahasrāṇi yāni upāyānti yānti ca
yathāśāstram vihartavyam teṣu tyaktvā sukha-asukhe

30. yāni vyavahāra-sahasrāṇi upāyānti ca yānti teṣu
sukha-asukhe tyaktvā yathāśāstram vihartavyam

30. Among the thousands of affairs that constantly arise and pass away, one should conduct oneself according to the scriptural injunctions (śāstra), having abandoned both pleasure and pain.

Words meanings summery:

• व्यवहार-सहस्राणि (vyavahāra-sahasrāṇi) - thousands of affairs (thousands of transactions/affairs)

• यानि (yāni) - that (which, what)

• उपायान्ति (upāyānti) - constantly arise (approach, come near, happen)

• यान्ति (yānti) - pass away (go, proceed, depart)

• च (ca) - and (and, also, moreover)

• यथाशास्त्रम् (yathāśāstram) - according to scriptural injunctions (śāstra) (according to scripture, according to rule)

• विहर्तव्यम् (vihartavyam) - one should conduct oneself (to be performed, to be behaved, one should act)

• तेषु (teṣu) - among them (in them)

• त्यक्त्वा (tyaktvā) - having abandoned (having abandoned, having given up)

• सुख-असुखे (sukha-asukhe) - both pleasure and pain (pleasure and pain)

Words meanings and morphology

व्यवहार-सहस्राणि (vyavahāra-sahasrāṇi) - thousands of affairs (thousands of transactions/affairs)

(compound noun)

Compound type : tatpurusha (vyavahāra+sahasra)

• vyavahāra – conduct, dealings, affairs, transaction
  noun (masculine)
  From vi-ava-√hṛ (to act, deal)
  Prefixes: vi+ava
  Root: hṛ (class 1)
• sahasra – thousand
  noun (neuter)

Note: Can also be accusative plural depending on sentence structure, but nominative here for the subject of `upāyānti` and `yānti`.

यानि (yāni) - that (which, what)

(pronoun)

Nominative, neuter, plural of yad

yad - who, which, what

उपायान्ति (upāyānti) - constantly arise (approach, come near, happen)

(verb)

3rd person , plural, active, present (laṭ) of upāyā

Prefixes: upa+ā

Root: yā (class 2)

यान्ति (yānti) - pass away (go, proceed, depart)

(verb)

3rd person , plural, active, present (laṭ) of yā

Root: yā (class 2)

च (ca) - and (and, also, moreover)

(indeclinable)

यथाशास्त्रम् (yathāśāstram) - according to scriptural injunctions (śāstra) (according to scripture, according to rule)

(indeclinable)

Compound type : avyayībhāva (yathā+śāstra)

• yathā – as, according to
  indeclinable
• śāstra – scripture, treatise, rule, instruction
  noun (neuter)
  Root: śās (class 2)

विहर्तव्यम् (vihartavyam) - one should conduct oneself (to be performed, to be behaved, one should act)

(gerundive)

Note: Used impersonally in passive voice (it is to be acted).

तेषु (teṣu) - among them (in them)

(pronoun)

Locative, neuter, plural of tad

tad - that, he, she, it

Note: Refers to vyavahāra-sahasrāṇi

त्यक्त्वा (tyaktvā) - having abandoned (having abandoned, having given up)

(indeclinable participle)

Note: Absolutive form

सुख-असुखे (sukha-asukhe) - both pleasure and pain (pleasure and pain)

(compound noun)

Compound type : dvandva (sukha+asukha)

• sukha – pleasure, happiness, comfort
  noun (neuter)
• asukha – pain, sorrow, misery, non-pleasure
  noun (neuter)
  nañ-tatpurusha compound: a (not) + sukha (pleasure)