The Student said,   Speak to me of existence. For this world is deceptive — in every corner dances a different shadow of what to pursue, what to follow.   And the Doorman said,   Here I stand on the shoulders of giants, for it is not I, but many before me who pointed out that existence is essentially playful. There is no necessity for it whatsoever.   It is like music or theatre. The whole purpose of it is simply to be enjoyed, to engage others, and to stimulate them. It is an experience. In one way of thinking, music, theatre and art are not essential —