One verse

Bhagavad Gita 6.34

6.34

चञ्चलं हि मनः कृष्ण प्रमाथि बलवद् दृढम् | तस्याहं निग्रहं मन्ये वायोरिव सुदुष्करम् ||६-३४||

cañcalaṃ hi manaḥ kṛṣṇa pramāthi balavad dṛḍham . tasyāhaṃ nigrahaṃ manye vāyoriva suduṣkaram ||6-34||

cañcalam
flickering
hi
certainly
manaḥ
mind
kṛṣṇa
O Kṛṣṇa
pramāthi
agitating
bala-vat
strong
dṛḍham
obstinate
tasya
its
aham
I
nigraham
subduing
manye
think
vāyoḥ
of the wind
iva
like
su-duṣkaram
difficult

The mind is restless, turbulent, obstinate and very strong, O Kṛṣṇa, and to subdue it, I think, is more difficult than controlling the wind.