Perfect Mystery

It's a perfect mysteryHow becomes a tree a treeBut there's something telling meThat nothing is for nothing is forNothing is for only one lifetimeLearning to beCops at the doorNo cops at the doorCops at the doorNo cops at the doorWhat a surprise!She looked in the cupboardAnd found the eyesIn the suitcaseOn the Isle of EverywhereIt becomes a man to shareAll and everything he cares forEveryone is everybody elseIs slowly melting themselvesTogether againLook up in the airThe Octave Doctor's there!And when he strokes his gongYour middle eye comes onWhat a surprise!She looked around for ZeroBut he'd lost his eyesIn a fruitcake