" What he taught was the ultimate doctrine of non-duality, or advaita, in which all other doctrines are finally absorbed: that Being is One and is manifested in the universe and in all creatures without ever changing from its eternal, unmanifest Self, much as, in a dream, the mind creates all the people and events a man sees, without losing anything by their creation or gaining anything by their re-absorption, without ceasing to be itself. "

― Ramana Maharshi , The Collected Works of Ramana Maharshi