Changes

The first object of the immobility of the Asana is to get rid of the restlessness imposed on the body and to force it to hold the ''Pranic'' energy instead of dissipating and squandering it... —just as the restless active mind seems to seize on and use irregularly and imperfectly whatever spiritual force comes into it, but the tranquilised mind is held, possessed and used by the spiritual force.

The body, thus liberated from itself, purified from many of its disorders and irregularities, becomes, partly by Asana, completely by combined Asana and

All this, however, the result in its perfection of Asana and Pranayama, is only a basic physical power and freedom. The higher use of Hathayoga depends more intimately on Pranayama. ...but the principal gain is that by this purification the vital energy can be directed anywhere, to any part of the body and in any way or with any rhythm of its movement.

The Prana has according to Yogic science a fivefold movement pervading all the nervous system and the whole material body and determining all its functionings. The Hathayogin seizes on the outward movement of respiration as a sort of key which opens to him the control of all these five powers of the ''Prana''. …a complete mastery of the body and the life and a free and effective use of them established upon a purification of their workings is founded as a basis for the higher aims of Hathayoga.