युवो वृद्धोऽतिवृद्धो वा व्याधितो दुर्बलोऽपि वा ।
अभ्यासात्सिद्धिमाप्नोति सर्व-योगेष्वतन्द्रितः ॥ ६७॥

Yuvo vrddhoativrddho vā vyādhito durbaloapi vā Abhyāsātsiddhimāpnoti sarvayogheshvatandritah

Success comes to him who is engaged in the practice. How can one get success without practice; for by merely reading books on Yoga, one can never get success.