It has been written: To the cynic the body is no more than a tenement of clay. To the poet, a palace of the soul. To the physician, an all too ailing hulk. The psychiatrist sees it as a housing for the mind and personality. The geneticist sees it as a perpetuation of its own kind. The biologist sees it as an organism which can alter the future as a result of the experience of the past. The anthropologist sees it as an accumulation of culture. Others have viewed the body as essentially just a machine, a concept that sometimes appeals and sometimes appalls. The English satirist Samuel Butler dismissed his fellow men as but "a pair of pincers set over a bellows and a stew pan and the whole thing fixed upon stilts." But to the more reverent, the bodily mechanism is a masterpiece of precise planning-a delicate and complex apparatus whose various components work as a unit to achieve such diverse feats as scaling a mountain top, building a bridge or composing a symphony.