Geniuses of certain kinds - mathematicians, chess players, computer programmers - seem, if not mad, at least lacking in the social skills most easily identified with sanity.

Tiny differences in input could quickly become overwhelming differences in output.... In weather, for example, this translates into what is only half-jokingly known as the Butter- fly Effect—the notion that a butterfly stirring the air today in Peking can transform storm systems next month in New York.

The history of life is written in terms of negative entropy.

Intuition was not just visual but also auditory and kinesthetic. Those who watched Feynman in moments of intense concentration came away with a strong, even disturbing sense of the physicality of the process, as though his brain did not stop with the grey matter but extended through every muscle in his body.

Vengeful conquerors burn books as if the enemy's souls reside there, too.

Writing comes into being to retain information across time and across space. Before writing, communication is evanescent and local; sounds carry a few yards and fade to oblivion. The evanescence of the spoken word went without saying. So fleeting was speech that the rare phenomenon of the echo, a sound heard once and then again, seemed a sort of magic.

When the Lilliputians first saw Gulliver's watch, that "wonderful kind of engine...a globe, half silver and half of some transparent metal," they identified it immediately as the god he worshiped. After all, "he seldom did anything without consulting it: he called it his oracle, and said it pointed out the time for every action in his life." To Jonathan Swift in 1726 that was worth a bit of satire. Modernity was under way. We're all Gullivers now. Or are we Yahoos?