"In other countries, congenital introverts simply remain introverts all their lives, neither advancing nor retreating, but America's commitment to extroversion as a national art form can abrade some naturally aloof personalities until they flower into deadly nightshade."

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The rate of progress is so rapid that what one learns at school or university is always a bit out of date. Only a few people can keep up with the rapidly advancing frontier of knowledge, and they have to devote their whole time to it and specialize in a small area. The rest of the population has little idea of the advances that are being made or the excitement they are generating.

— Stephen Hawking