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And first, for those things which seem common. Let men bear in mind that hitherto they have been accustomed to do no more than refer and adapt the causes of things which rarely happen to such as happen frequently, while of those which happen frequently they never ask the cause, but take them as they are for granted…
Only when a few curious people said "I don't know" did science begin. Recognition of our ignorance is a prerequisite of scientific discovery.
Science finds order and meaning in our experience, and sets about this in quite a different way. It sets about it as New¬ ton did in the story which he himself told in his old age, and of which the schoolbooks give only a caricature. In the year 1665, when Newton was twenty-two, the plague broke out in southern…