योगवासिष्ठः yogavāsiṣṭhaḥ - book-1, chapter-26, verse-39

परोपकारकारिण्या परार्तिपरितप्तया ।
बुद्ध एव सुखी मन्ये स्वात्मशीतलया धिया ॥ ३९ ॥

paropakārakāriṇyā parārtiparitaptayā ,
buddha eva sukhī manye svātmaśītalayā dhiyā 39

39. para-upakāra-kāriṇyā para-ārti-paritaptayā
buddhaḥ eva sukhī manye sva-ātma-śītalayā dhiyā

39. manye buddhaḥ eva sukhī paropakāra-kāriṇyā
parārti-paritaptayā sva-ātma-śītalayā dhiyā

39. I believe that only an enlightened (buddha) person is truly happy, having an intellect (dhī) that is tranquil within their own (ātman) self, performs good for others, and is pained by the suffering of others.

Words meanings summery:

• पर-उपकार-कारिण्या (para-upakāra-kāriṇyā) - by one who performs good to others, by one who helps others

• पर-आर्ति-परितप्तया (para-ārti-paritaptayā) - by one distressed by others' suffering

• बुद्धः (buddhaḥ) - enlightened, awakened (buddha)

• एव (eva) - only, certainly, indeed

• सुखी (sukhī) - happy, joyful

• मन्ये (manye) - I think, I believe, I consider

• स्व-आत्म-शीतलया (sva-ātma-śītalayā) - by one whose inner self (ātman) is calm/cooled

• धिया (dhiyā) - by intellect, by understanding, by mind

Words meanings and morphology

पर-उपकार-कारिण्या (para-upakāra-kāriṇyā) - by one who performs good to others, by one who helps others

(adjective)

Instrumental, feminine, singular of para-upakāra-kāriṇī

para-upakāra-kāriṇī - one who does good to others

Compound type : upapada tatpuruṣa (para+upakāra+kāriṇī)

• para – other, different, supreme
  adjective (masculine)
• upakāra – help, benefit, good deed
  noun (masculine)
• kāriṇī – female doer, performer (feminine of kārin)
  noun (feminine)
  Agent Noun (feminine)
  From root kṛ with suffix ṇin
  Root: kṛ (class 8)

पर-आर्ति-परितप्तया (para-ārti-paritaptayā) - by one distressed by others' suffering

(adjective)

Instrumental, feminine, singular of para-ārti-paritaptā

para-ārti-paritaptā - one who is distressed by others' suffering

Compound type : bahuvrīhi (para+ārti+paritaptā)

• para – other, different
  adjective (masculine)
• ārti – suffering, pain, distress
  noun (feminine)
• paritaptayā – distressed, tormented, burnt
  adjective (feminine)
  Past Passive Participle
  From root tap with prefix pari
  Prefix: pari
  Root: tap (class 1)

बुद्धः (buddhaḥ) - enlightened, awakened (buddha)

(adjective)

Nominative, masculine, singular of buddha

buddha - enlightened, awakened, known, the Buddha

Past Passive Participle

From root budh

Root: budh (class 1)

एव (eva) - only, certainly, indeed

(indeclinable)

सुखी (sukhī) - happy, joyful

(adjective)

Nominative, masculine, singular of sukhin

sukhin - happy, joyful, comfortable

मन्ये (manye) - I think, I believe, I consider

(verb)

1st person , singular, middle, present (laṭ) of man

Root: man (class 4)

स्व-आत्म-शीतलया (sva-ātma-śītalayā) - by one whose inner self (ātman) is calm/cooled

(adjective)

Instrumental, feminine, singular of sva-ātma-śītalā

sva-ātma-śītalā - having one's own (ātman) self cooled/calmed

Compound type : bahuvrīhi (sva+ātman+śītalā)

• sva – own, one's own
  pronoun (masculine)
• ātman – self, soul, spirit, individual self (ātman)
  noun (masculine)
• śītala – cool, cold, calm, tranquil
  adjective (feminine)

धिया (dhiyā) - by intellect, by understanding, by mind

(noun)

Instrumental, feminine, singular of dhī

dhī - intellect, understanding, mind, thought