The mind - like the wind

Lord Krishna said: Undoubtedly, O Arjuna, the mind is restless and difficult to restrain, but it is subdued by any constant vigorous spiritual practice such as meditation with perseverance, and by detachment, O Arjuna. (6.35)

श्रीभगवानुवाच
असंशयं महाबाहो मनो दुर्निग्रहं चलम् ।
अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते ॥६- ३५॥