The main objective of hatha yoga is to create an absolute balance of the interacting activities and processes of the physical body, mind and energy. When this balance is created, the impulses generated give a call of awakening to the central force (sushumna nadi) which is responsible for the evolution of human consciousness. If hatha yoga is not used for this purpose, its true objective is lost.
— Hatha Yoga Pradipika
hathaHatha Yoga Pradipika