The Swan Knight: A Medieval Legend, Retold from Wagner's Lohengrin - Skyhook World Classics, #5

The lights dim, and a weighty silence falls upon the audience. From all over Europe and America, these fifteen hundred men and women have come to spend many days in this small German town and many hours in this theater. Some are merely curious. Some are there because it's the fashion. But many have come out of devotion to the musical dramas of a composer they revere, almost worship -- a composer who himself designed and built the theater they sit in.
To them, this theater is a temple, and their journey a pilgrimage. For a full minute or more, they wait solemnly in the dark, barely daring to move, their attention resting on the curtained stage below. Then the first musical notes float up and surround them -- high, soft, sustained notes of strings and woodwinds -- from an orchestra entirely hidden from view.  The composer's devotees know what vision this shimmering music is meant to impart: the descent from Heaven of the Holy Grail, the drinking cup of Christ at the Last Supper.
In their minds, they watch it draw nearer to earth, as the music grows louder and deeper and louder still, at last bursting out in horns, tympani, and cymbals. Then the Grail ascends once more, the music gradually softening until strings and woodwinds lead out as gently as they led in.  And now the curtains part, and the audience knows it will soon meet the knight who serves that Grail.