Nine Obstacles in practice
There will be obstacles in practice as one proceeds on the path of self-knowledge. Without these obstacles, we would return to the natural state very easily. The natural energies are like a river which has been dammed —when the dam is removed, the water begins to flow. So, as you remove the obstacles, the energy starts flowing naturally and consciousness expands.
Asanas
Asana means “seat” in Sanskrit. In Yoga, the different poses or postures are called asanas. There is only one sutra in The Yoga Sutras of Patanjali that mentions the word asanas. It says: Sthira sukham asanam. Sthira means “steady” and indicates a static pose without movement. While sukham typically means “happy,” it means “comfortable” or “relaxed” in this case. This sutra indicates that The Yoga Sutras are referring to static poses, not done in the spirit of competition.