From article...

"To dance is to be out of yourself," Agnes de Mille famously proclaimed. "Larger, more beautiful, more powerful. This is power, it is glory on earth and it is yours for the taking." Although the iconic 20th century dancer and choreographer makes it look easy, it can be difficult to accurately put the allure of dance into words. By nature, dance is a wordless form of expression, translating emotions and thoughts into physical movements. But we wondered, is there a way to explain why we dance?"

http://www.huffingtonpost.com/2014/12/18/whyidance_n_6344090.html?ir=Women&ncid=fcbklnkushpmg00000046