The singers of the ancient times sang the same raga, the same song, hundreds of times, thousands of times, a million times. It is by repetition of one thing, by association that we can produce in ourselves the creative power. To have acquired a great store of knowledge, so many songs, so many ragas is nothing. It is the power of producing from within oneself, of creating, that is great. Indian music gained very much by its contact with Persian music. It learned grace and the expression of Persian music. And it gained much from the beauty of the Arabic rhythm. After the rise of the Moghul empire it was much more beautiful than it had been before.