Practice is crucial no doubt, but without detachment or vairagya, it does not bear the desired result in practice of Yoga and Spirituality. Without detachment or vairagya, knowledge of scriptures does not make a spiritual aspirant to grow in his spiritual quest. Without vairagya, one cannot properly follow any Yoga or Spiritual discipline.
A seeker in the path of Jnana Yoga needs to develop detachment from body and mind. A seeker in the path of Karma Yoga needs to develop detachment of the will from the fruits of action. A seeker in the path Of Bhakti needs to develop detachment to all worldly feelings that come in the way of his love for the Divine Beloved. And a Raja Yogi has to develop detachment to all distracting thoughts that make the mind restless. Whatever be the path of Yoga, detachment is complementary to practice in getting the desired result.
Practice without detachment is lame and detachment without practice is blind. What one needs, therefore, is a harmonious combination of both practice and detachment in yoga and spirituality for spiritual growth.
Dr.Mahesh Chandra Panda