Non-Duality Through Devotion: The Message of Adi Shankaracharya Adi Shankaracharya is known as the greatest teacher of Advaita Vedanta, the philosophy of non-duality. He said Brahman alone is real and the individual self is not different from it. Then people get a doubt. If everything is one, why did he write beautiful hymns on Ganesha, Murugan, Shiva, Vishnu and Devi? Why did he promote murti worship and Srividya upasana? The answer is simple. Advaita is the final truth, but a person cannot jump into it in one day and declare "I have reached." Actually there is nothing to reach, because we are already That. But the mind is very difficult to control. Every day it creates a storm and throws a person here and there. For crossing this storm, a good boat is needed. Devotion to a deity is that boat. What the Scriptures Say The Rig Veda says "Ekam sat viprah bahudha vadanti" (Rig Veda 1.164.46). Truth is one, the wise call it by many names. So Murugan, Ganesha, Shiv...