The purpose of the various postures is threefold. First, they provide a stable feeling in the body. This allows you to remove your attention from such issues as balance and muscular fatigue, so that you can center your concentration on the formal object of meditation. Second, they promote physical immobility, which is then reflected by an immobility of mind. This creates a deeply settled and tranquil concentration. Third, they give you the ability to sit for a long period of time without yielding to the meditator’s three main enemies — pain, muscular tension, and falling asleep.
