Bhagavad Gita 6.34

चञ्चलं हि मनः कृष्ण प्रमाथि बलवद्दृढम्।तस्याहं निग्रहं मन्ये वायोरिव सुदुष्करम्॥

cañcalaṃ hi manaḥ kṛṣṇa pramāthi balavaddṛḍham |tasyāhaṃ nigrahaṃ manye vāyoriva suduṣkaram ||

The mind is indeed restless, turbulent, strong, and unyielding, O Krishna; I consider it as difficult to control as controlling the wind.

My Lord! Verily, the mind is fickle and turbulent, obstinate, and strong; indeed, it is extremely difficult to control, like the wind.

Our plain-language meaning of this verse is waiting for scholar review.