Verse
श्रीभगवानुवाच:असंशयं महाबाहो मनो दुर्निग्रहं चलम् ।अभ्यासेन तु कौन्तेय वैराग्येण च गृह्यते ॥
The Blessed Lord said: Without doubt, O mighty-armed, the mind is restless and very difficult to restrain; but O Kaunteya, it may be controlled by constant practice and non-attachment.
Gītā 6·35