The purpose of all yoga practices is to create a sense of health and wellbeing; to create a feeling of ease and harmony with our selves and our environment. Unfortunately, in these modern fast paced times our natural rythms are frequently and persistantly knocked out of sync creating a sensation of anxiety, discord and discomfort eventually, as far as the yogic modality of health care is concerned, leading to dis-ease.
We all encounter difficulties within our lives at some time or another the key is to have the correct tools at hand to help us regain our state of equilibrium as quickly as possible. Yoga is supported by a very ancient philosophy dating back around 10,000 called the Samkhya philosophy, which discribes in great detail the natural principles of the universe and the creation of our material world. From this wisdom (and modern physicists are beginning to agree with it) the practices of yoga and its medical sister ayurveda developed as the first forms of social care or healing. They are not separate but wholly integrated parts of each other. A huge science of healing developed in order to counteract suffering and disease and especially the largest disease of all - our disassociation from our source or ignorance of that which is real and true and that which is unreal and untrue.
This isn't just about addressing symptoms but looking at the underlying energetic disharmony causing those symptoms and we have, in yoga, a very specific framework of subtle anatomy and energetic principles to work with.