One cannot imagine a life without the sun. All planets rotate around the sun and get their energy from it. For all living forms too, sun is the source of sustenance, radiance, strength and power. Through the Sun Sadhana one can obtain knowledge, intelligence and power. Even science accepts that the Sun rays are capable of preventing diseases in a human. For incurable diseases the Sun Sadhana is considered best. In the ancient times the Rishis and Yogis used to worship the Sun and perform its Sadhana for remaining disease free and healthy. It is not just in India the Sun has been worshipped in all around the world all civilizations like Roman, Greek and Egyptian.