yogaḥ–Yoga; duṣprāpaḥ–is difficult to attain; asaṁyata-ātmanā–by a person of uncontrolled mind; iti–this is; me–My; matiḥ–opinion; tu– but; yatatā–one who strives; vaśya-ātmanā–to control the mind; upāyataḥ–by the appropriate method of arduous practice (sādhana); avāptum śakyaḥ–can attain to yoga. [36]

I consider that yoga is difficult to attain for the person of unrestrained mind. But one who strives to restrain the mind by the appropriate practice can succeed in yoga.