One school says that all types of Yoga are contained within perfection of asanas, while others say that too much emphasis on the body keeps you limited to the gross material plane. Tradition is important just as history is important - not as a vice to squeeze the present into, but rather as a stepping stone to grow from. It is necessary for all serious practitioners of Yoga to take from other people's experience that which can be helpful to create a personal expression of Yoga. In the years that I have been exploring Yoga, an approach has taken form that has been continually revealing, renewing and exciting. What follows is a brief introduction to the way I answer this question.
Yoga is a living process.
Learning is a process, a movement, while attainments are static. One is internally learning about the whole field of life using the energy systems of one's mind and body to find out how one works and how universal patterns express themselves through individuals. Yoga also involves the process of freeing one's energy, moving out of the blocks and binds that limit one both physically and mentally. Freeing oneself is part of the process of self-knowledge for one's binds limit the nature of the exploration, just as releasing them permits learning to occur. The bondage of flesh and the tyranny of mind as they endlessly create desire, are to be overcome through discipline.