Why should you practice Yoga? To kindle the divine fire within yourself. Everyone has a dormant spark of divinity in him which has to be fanned into flame.
Willpower is concrete, not ethereal. When you do something, you demonstrate your willpower, and it becomes all the easier to have the same power of will the next time.
First yoga deals with health, strength and conquest of the body. Next, it lifts the veil of difference between the body and the mind. Lastly, it leads the Sadhaka to peace and unalloyed purity.
