The Devas couldn’t understand the Natyaveda because it was too complex and confusing for them. They struggled to grasp its concepts, leading Brahma to seek someone who could simplify it.
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Although Brahma created the Natyaveda with elements from the four Vedas, the Devas found it too difficult to understand. Its complex blend of dialogue, movement, music and emotions confused them. They were unable to grasp how to use or apply this new form of knowledge. Seeing their struggle, Brahma realized the need for someone wise and capable to simplify and organize the Natyaveda into an understandable and usable form, leading him to call upon Bharata Muni.