Here is the Sanskrit anuvad, Hindi anuvad, and English translation of Atma-Samyama Yoga Chapter 6, Verse 6.34.
Sanskrit
चञ्चलं हि मनः कृष्ण प्रमाथि बलवद्u200cदृढम् । तस्याहं निग्रहं मन्ये वायोरिव सुदुष्करम् ॥ ६.३४ ॥
Hindi
क्योंकि हे श्रीकृष्ण ! यह मन बड़ा चञ्चल, प्रमथन स्वभाववाला, बड़ा दृढ़ और बलवान् है । इसलिये उसका वशमें करना मैं वायुको रोकनेकी भाँति अत्यन्त दुष्कर मानता हूँ|
English
Dear Krishna, the mind is truly very unstable, forceful and strong. It is just as difficult to control as the flow of the wind.