महाभारतः mahābhārataḥ - book-12, chapter-290, verse-25

मध्यस्थमेकमात्मानं पापं यस्मिन्न विद्यते ।
द्वितीयं कर्म विज्ञाय नृपते विषयैषिणाम् ॥२५॥

25. madhyasthamekamātmānaṁ pāpaṁ yasminna vidyate ,
dvitīyaṁ karma vijñāya nṛpate viṣayaiṣiṇām.

25. madhyastham ekam ātmānam pāpam yasmin na vidyate
dvitīyam karma vijñāya nṛpate viṣayaiṣiṇām

25. nṛpate,
yasmin pāpam na vidyate,
tat madhyastham ekam ātmānam vijñāya,
viṣayaiṣiṇām dvitīyam karma (api) vijñāya (iti jñāhi).

25. O king, one should understand the singular, impartial Self (ātman), in which no sin is found. And one should also understand the 'second' principle: action (karma) associated with those who pursue worldly objects.

Words meanings summery:

• मध्यस्थम् (madhyastham) - impartial (referring to the Self) (impartial, neutral, in the middle, central)

• एकम् (ekam) - singular, unique (one, single, unique, alone)

• आत्मानम् (ātmānam) - the Self, the ultimate reality of an individual (Self, soul, essence, individual soul)

• पापम् (pāpam) - sin, moral impurity (sin, evil, bad deed, vice)

• यस्मिन् (yasmin) - in which (referring to the Self) (in which, wherein, when, where)

• न (na) - not (not, no, nor)

• विद्यते (vidyate) - is found, exists (exists, is found, is present, is known)

• द्वितीयम् (dvitīyam) - the second (principle/concept) (second)

• कर्म (karma) - action, especially worldly action driven by desire (action, deed, work, destiny)

• विज्ञाय (vijñāya) - having thoroughly understood (having known, having understood, having ascertained)

• नृपते (nṛpate) - O king (addressing the listener) (O king, O ruler)

• विषयैषिणाम् (viṣayaiṣiṇām) - of those who pursue worldly objects/sense pleasures (of those desiring objects, of those seeking worldly pleasures)

Words meanings and morphology

मध्यस्थम् (madhyastham) - impartial (referring to the Self) (impartial, neutral, in the middle, central)

(adjective)

Accusative, masculine, singular of madhyastha

madhyastha - standing in the middle, impartial, neutral, indifferent

From madhya (middle) + stha (standing, from root sthā 'to stand')

Compound type : tatpurusha (madhya+stha)

• madhya – middle, center
  noun (neuter)
• stha – standing, staying, situated
  adjective (masculine)
  Derived from root sthā (to stand)
  Root: sthā (class 1)

Note: Agrees with ātmānam.

एकम् (ekam) - singular, unique (one, single, unique, alone)

(numeral)

Note: Agrees with ātmānam.

आत्मानम् (ātmānam) - the Self, the ultimate reality of an individual (Self, soul, essence, individual soul)

(noun)

Accusative, masculine, singular of ātman

ātman - Self, soul, essence, individual soul, supreme soul, spirit

Root: an (class 2)

Note: Object of the implied verb 'know' or 'understand'.

पापम् (pāpam) - sin, moral impurity (sin, evil, bad deed, vice)

(noun)

Nominative, neuter, singular of pāpa

pāpa - sin, evil, bad deed, vice, wickedness

Note: Subject of 'vidyate'.

यस्मिन् (yasmin) - in which (referring to the Self) (in which, wherein, when, where)

(pronoun)

Locative, masculine, singular of yad

yad - which, what, that

Note: Refers to ātmānam.

न (na) - not (not, no, nor)

(indeclinable)

Note: Negates the verb 'vidyate'.

विद्यते (vidyate) - is found, exists (exists, is found, is present, is known)

(verb)

3rd person , singular, middle, present (lat) of vid

Passive/Middle voice form of root vid (to be, to exist, to find)

Root: vid (class 4)

द्वितीयम् (dvitīyam) - the second (principle/concept) (second)

(numeral)

Note: Refers to karma, treated as neuter.

कर्म (karma) - action, especially worldly action driven by desire (action, deed, work, destiny)

(noun)

Accusative, neuter, singular of karma

karma - action, deed, work, rite, destiny, effect of actions

From root kṛ (to do, to make) + -man suffix

Root: kṛ (class 8)

Note: Object of 'vijñāya'.

विज्ञाय (vijñāya) - having thoroughly understood (having known, having understood, having ascertained)

(indeclinable)

absolutive/gerund

Absolutive form of root jñā (to know) with prefix vi-

Prefix: vi

Root: jñā (class 9)

Note: Implies an action to be performed by the listener (king).

नृपते (nṛpate) - O king (addressing the listener) (O king, O ruler)

(noun)

Vocative, masculine, singular of nṛpati

nṛpati - king, monarch, ruler

Compound of nṛ (man) + pati (master, lord)

Compound type : tatpurusha (nṛ+pati)

• nṛ – man, human being
  noun (masculine)
• pati – master, lord, husband
  noun (masculine)

विषयैषिणाम् (viṣayaiṣiṇām) - of those who pursue worldly objects/sense pleasures (of those desiring objects, of those seeking worldly pleasures)

(adjective)

Genitive, masculine, plural of viṣayaiṣin

viṣayaiṣin - desiring objects, seeking worldly pleasures

Compound of viṣaya (sense object) + eṣin (desiring, seeking, from root iṣ 'to wish' + suffix -in)

Compound type : tatpurusha (viṣaya+eṣin)

• viṣaya – object of sense, realm, sphere, domain
  noun (masculine)
• eṣin – desiring, seeking, going towards
  adjective (masculine)
  From root iṣ (to wish, desire) with suffix -in
  Root: iṣ (class 6)

Note: Qualifies or relates to 'karma'.