. "Of men: : non est Cantandum, there is no occasion for singing , i. e. for imagination , fiction : ad manum histrioni, in comedy, to sing and play while the actor accompanies the song with gestures or dancing ." . "Of men: : non est Cantandum, there is no occasion for singing , i. e. for imagination , fiction : ad manum histrioni, in comedy, to sing and play while the actor accompanies the song with gestures or dancing ." . .