Muscular dystrophy ... was never seen until Duchenne described it in the 1850s. By 1860, after his original description, many hundreds of cases had been recognised and described, so much so that Charcot said: 'How is it that a disease so common, so widespread, and so recognisable at a glance - a disease which has doubtless always existed - how is it that it is recognised only now? Why did we need M. Duchenne to open our eyes?'
Oliver SacksNature gropes and blunders and performs the crudest acts. There is no steady advance upward. There is no design.
Oliver SacksMemory is dialogic and arises not only from direct experience but from the intercourse of many minds.
Oliver Sacks