महाभारतः mahābhārataḥ - book-5, chapter-34, verse-62

आत्मनात्मानमन्विच्छेन्मनोबुद्धीन्द्रियैर्यतैः ।
आत्मैव ह्यात्मनो बन्धुरात्मैव रिपुरात्मनः ॥६२॥

62. ātmanātmānamanvicchenmanobuddhīndriyairyataiḥ ,
ātmaiva hyātmano bandhurātmaiva ripurātmanaḥ.

62. ātmanā ātmānam anvicchet manobuddhīndriyaiḥ yataiḥ
ātmā eva hi ātmanaḥ bandhuḥ ātmā eva ripuḥ ātmanaḥ

62. One should seek one's higher self (ātman) by one's own efforts, with a controlled mind, intellect, and senses. For indeed, one's self (ātman) is one's only friend, and one's self (ātman) is also one's only enemy.

Words meanings summery:

• आत्मना (ātmanā) - by one's own efforts (ātman) (by the self (ātman), by oneself)

• आत्मानम् (ātmānam) - one's higher self (ātman) (the self (ātman), oneself)

• अन्विच्छेत् (anvicchet) - one should seek, investigate, search for

• मनोबुद्धीन्द्रियैः (manobuddhīndriyaiḥ) - by the mind, intellect, and senses

• यतैः (yataiḥ) - by controlled mind, intellect, and senses (by those who are controlled/restrained, by controlled (senses etc.))

• आत्मा (ātmā) - one's self (ātman) (the self (ātman), soul)

• एव (eva) - alone, indeed, only, just

• हि (hi) - indeed, certainly, for

• आत्मनः (ātmanaḥ) - of one's self (ātman) (of the self (ātman), to the self)

• बन्धुः (bandhuḥ) - friend, kinsman, relative

• आत्मा (ātmā) - one's self (ātman) (the self (ātman), soul)

• एव (eva) - alone, indeed, only, just

• रिपुः (ripuḥ) - enemy, foe

• आत्मनः (ātmanaḥ) - of one's self (ātman) (of the self (ātman), to the self)

Words meanings and morphology

आत्मना (ātmanā) - by one's own efforts (ātman) (by the self (ātman), by oneself)

(noun)

Instrumental, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Refers to the agent of seeking.

आत्मानम् (ātmānam) - one's higher self (ātman) (the self (ātman), oneself)

(noun)

Accusative, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Object of 'anvicchet'.

अन्विच्छेत् (anvicchet) - one should seek, investigate, search for

(verb)

3rd person , singular, active, optative (vidhi-liṅ) of anviṣ

Root 'iṣ' (class 6), optative mood with prefix 'anu'

Prefix: anu

Root: iṣ (class 6)

Note: Implied subject is 'one'.

मनोबुद्धीन्द्रियैः (manobuddhīndriyaiḥ) - by the mind, intellect, and senses

(noun)

Instrumental, neuter, plural of manobuddhīndriya

manobuddhīndriya - mind, intellect, and senses

Dvanda compound of 'manas' (mind), 'buddhi' (intellect), and 'indriya' (senses)

Compound type : dvandva (manas+buddhi+indriya)

• manas – mind, intellect, thought, understanding
  noun (neuter)
• buddhi – intellect, understanding, reason, perception
  noun (feminine)
• indriya – sense organ, faculty of sense, power
  noun (neuter)

Note: Instrumental plural, refers to the means by which the self is sought.

यतैः (yataiḥ) - by controlled mind, intellect, and senses (by those who are controlled/restrained, by controlled (senses etc.))

(participle)

Instrumental, neuter, plural of yata

yata - controlled, restrained, disciplined, collected

Past Passive Participle

From root 'yam' (to control, restrain)

Root: yam (class 1)

Note: Modifies 'manobuddhīndriyaiḥ'.

आत्मा (ātmā) - one's self (ātman) (the self (ātman), soul)

(noun)

Nominative, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Subject of 'is a friend'.

एव (eva) - alone, indeed, only, just

(indeclinable)

Note: Emphatic particle.

हि (hi) - indeed, certainly, for

(indeclinable)

आत्मनः (ātmanaḥ) - of one's self (ātman) (of the self (ātman), to the self)

(noun)

Genitive, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Possessive relation to 'bandhuḥ'.

बन्धुः (bandhuḥ) - friend, kinsman, relative

(noun)

Nominative, masculine, singular of bandhu

bandhu - relative, kinsman, friend, connection

From root 'bandh' (to bind)

Root: bandh (class 9)

Note: Predicate noun.

आत्मा (ātmā) - one's self (ātman) (the self (ātman), soul)

(noun)

Nominative, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Subject of 'is an enemy'.

एव (eva) - alone, indeed, only, just

(indeclinable)

Note: Emphatic particle.

रिपुः (ripuḥ) - enemy, foe

(noun)

Nominative, masculine, singular of ripu

ripu - enemy, foe, adversary

Note: Predicate noun.

आत्मनः (ātmanaḥ) - of one's self (ātman) (of the self (ātman), to the self)

(noun)

Genitive, masculine, singular of ātman

ātman - self, soul, spirit, individual consciousness

Note: Possessive relation to 'ripuḥ'.