The philosophical teaching of yoga applies to the mind as well as to the body; indeed, it unites both to lead to the accomplishment of man. While in some traditional schools the physical exercises had a purely serving function, today they threaten to become an end in themselves. Vanamali Gunturu describes the history of yoga from the Yoga Sutra of Patanjali to modern Hathayoga and shows how central the philosophy of yoga is for today’s practice.