"Learning to play the guitar is a combination of mental and motor skill acquisition. And to develop motor skill, repetition is essential... Whenever musicians have trouble executing a passage, they generally tend to blame themselves for not having enough talent. Actually, all that's wrong is they don't know where their fingers are supposed to go...you should learn the piece in your head before you play it. And when you do play it, play it so slow that there's no possibility of making a mistake."

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If war can indeed be turned into a relic, then the virtue of greed will recede further. From a given society's standpoint, one big upside of wanton material acquisition has traditionally been the way it drives technological progress-which, after all, helps keep societies strong. In the nineteenth century, Russia ans Germany had little choice about modernizing; in those days stasis invited conquest. But if societies no longer face conquest, breakneck technological advance is an offer they can refuse, and frugality a luxury people can afford.

— Robert Wright