Neither right nor left

I am the poet who teaches the stage its lightFrom behind the scenesI am the concerto of a suicide swanApplauding the greatness of its melodyBlind cadre..!I paid the price of admissionAnd lost myselfIn exchange for my right..!!I am a purple collectionWhich folds its reader with itDries itA sad flowerI am the cover that fingers craveAnd endsSwallowing it..!!