Before you attempt anything that is considered as a mystical process, it is very important to stabilize the five fundamental elements within you. These are known as pancha bhutas or maha tatwas in the yogic science. The body, the very earth, the universe, and the cosmos, all are just a play of five elements. The body’s composition is such that most of it is water. Then there is earth, air, fire, and the rest is akash or etheric space.
Ashta is the Sanskrit word for “eight”. Anga simply means “limb”… and thus ashtanga means “eight-limbs”, referring to the eight limbs of yoga organized by Maharishi Patanjali some 2,000 years ago These 8 limbs of yoga encompass all the practices necessary for the sadhaka (yoga student) to gain health and vitality; to cultivate awareness and understanding; to gain insight into the deeper demensions of their self and the Universe around us; and to acheive ultimate health, harmony and happiness in life. And so yoga involves more than just the physical practices and techniques that have become popular today.
Inner and outer are intertwined very closely in yoga.Yoga is many things to many people, but in its full potential the practice of yoga can provide the means to transform suffering into happiness.
There are various Yoga: Mantra Yoga, Hatha Yoga, Laya Yoga and RajaYoga, as well as Ashtanga yoga (yama, niyama, asana, pranayama, pratyahara, dharana, dhyana and samadhi).