When the poisons of body&mind digest in the fire of practice, there yogi will begin experiencing the bliss of living! Fire of practice creating wrong way just digest the practitioner in that fire! Yoga is a life controlling process; NOT the life destruction process!
Each bite of knowledge taking us one step ahead in the path of life. It's not going to stop us from the end; but it can reduce the pain in life what it going through. Every philosophy and science created on the base of it only. And I am pretty sure that it will remain like that till the life goes in this universe.