The Dionysian for self-transcendence: To go upward, one must first go downward. Of course, this must be barbelled with Apollonian. Last week, I went to an exhibition on Goya, in Boston. It was filled with his bizarre and fantastic dream-drawings, exploring the strange manias and nightmares that fill humans’ minds when their reason is switched off - as in the classic engraving, the Sleep of Reason Produces Monsters. The museum booksto...