Yoga is the state wherein there is no thought or doubt. Yoga is the control of mind and its modifications. Yoga is the equal state between soul and Ultimate soul. The word 'Yogi' signifies an aspirant or a student in the path of yoga, as well as a full blown developed adept in yoga. He who is fully established in the highest super-consciousness is a yogi. He who practices yoga is also a yogi. A 'raja yogi' is otherwise known as 'dhyana yogi'. Dhyana means meditation. It is the continuous flow of one idea of God. Raja yoga aims at controlling all thought-waves or mental modifications. It concerns with the mind, its purification and control. Hence it is called, 'raja yoga, king of yogas'. It is otherwise known as ashtanga yoga (yoga with eight limbs).

 Ashtang Yoga is done in steps as starting with Yama climbing up the stages upto Samadhi: