योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-1, verse-18

रसभावनमन्तस्ते मालं भवतु कर्मसु ।
दारुयन्त्रमयस्येव परार्थमिव कुर्वतः ॥ १८ ॥

rasabhāvanamantaste mālaṃ bhavatu karmasu ,
dāruyantramayasyeva parārthamiva kurvataḥ 18

18. rasabhāvanam antas te mālam bhavatu karmasu |
dāruyantramayasya iva parārtham iva kurvataḥ ||

18. te antas karmasu rasabhāvanam mālam bhavatu.
dāruyantramayasya iva parārtham iva kurvataḥ [tiṣṭha].

18. Let the inner experience of gratification or sentiment (rasabhāvanam) become an impurity (māla) for you in your actions (karma), just as one performs for the sake of others, like a wooden machine.

Words meanings summery:

• रसभावनम् (rasabhāvanam) - the inner experience of personal gratification or sentiment derived from actions (the feeling/cultivation of essence/taste/sentiment, gratification)

• अन्तस् (antas) - within you, referring to one's internal self (within, inside, inner)

• ते (te) - for your inner self, referring to the practitioner (for you, to you, your)

• मालम् (mālam) - an undesirable element, an impediment to detachment (impurity, stain, blemish, dirt)

• भवतु (bhavatu) - let it be considered or treated as (let it be, let it become)

• कर्मसु (karmasu) - when engaged in any activity or ritual (karma) (in actions, in deeds)

• दारुयन्त्रमयस्य (dāruyantramayasya) - like a wooden machine, implying mechanical, unattached action (of a wooden machine, belonging to a wooden machine)

• इव (iva) - like, as if, similar to

• परार्थम् (parārtham) - without self-interest, for the benefit of others (for the sake of another, for others' purpose)

• इव (iva) - like, as if, similar to

• कुर्वतः (kurvataḥ) - one who is performing, referring to the practitioner (performing, doing, acting)

Words meanings and morphology

रसभावनम् (rasabhāvanam) - the inner experience of personal gratification or sentiment derived from actions (the feeling/cultivation of essence/taste/sentiment, gratification)

(noun)

Nominative, neuter, singular of rasabhāvana

rasabhāvana - cultivation of taste/sentiment; feeling of essence

Compound type : tatpuruṣa (rasa+bhāvana)

• rasa – essence, sap, taste, sentiment, pleasure
  noun (masculine)
  Root: ras (class 1)
• bhāvana – causing to be, forming, producing, conceiving, contemplation, feeling
  noun (neuter)
  Derived from root bhū (to be, to become) with suffix -ana
  Root: bhū (class 1)

Note: Subject of the verb 'bhavatu'.

अन्तस् (antas) - within you, referring to one's internal self (within, inside, inner)

(indeclinable)

ते (te) - for your inner self, referring to the practitioner (for you, to you, your)

(pronoun)

singular of yuṣmad

yuṣmad - you

Note: In this context, often understood as dative of reference or possession: 'for you' or 'your'.

मालम् (mālam) - an undesirable element, an impediment to detachment (impurity, stain, blemish, dirt)

(noun)

Nominative, neuter, singular of māla

māla - dirt, impurity, stain, sin, blemish

Root: mal

Note: Predicate nominative with 'bhavatu'.

भवतु (bhavatu) - let it be considered or treated as (let it be, let it become)

(verb)

3rd person , singular, active, imperative (loṭ) of bhū

Root: bhū (class 1)

कर्मसु (karmasu) - when engaged in any activity or ritual (karma) (in actions, in deeds)

(noun)

Locative, neuter, plural of karma

karma - action, deed, work, ritual, fate (karma)

Derived from root kṛ (to do) with suffix -man

Root: kṛ (class 8)

दारुयन्त्रमयस्य (dāruyantramayasya) - like a wooden machine, implying mechanical, unattached action (of a wooden machine, belonging to a wooden machine)

(adjective)

Genitive, masculine, singular of dāruyantramaya

dāruyantramaya - consisting of a wooden machine, made of a wooden machine

Formed by suffix -maya(t) added to dāruyantra

Compound type : tatpuruṣa (dāruyantra+maya)

• dāruyantra – wooden machine, automaton
  noun (neuter)
• maya – made of, consisting of, full of
  suffix/adjective
  Derived from the suffix mayat

Note: Agrees with 'kurvataḥ'.

इव (iva) - like, as if, similar to

(indeclinable)

परार्थम् (parārtham) - without self-interest, for the benefit of others (for the sake of another, for others' purpose)

(noun)

Accusative, neuter, singular of parārtha

parārtha - object or purpose of another, another's interest or advantage

Compound type : tatpuruṣa (para+artha)

• para – other, another, supreme, highest
  adjective (masculine)
• artha – aim, purpose, meaning, wealth, thing
  noun (masculine)

Note: Used adverbially to express purpose or manner.

इव (iva) - like, as if, similar to

(indeclinable)

कुर्वतः (kurvataḥ) - one who is performing, referring to the practitioner (performing, doing, acting)

(verbal derivative)

Note: Refers to the implicit agent (you).