"With the enormous and steady increase in the volume of our literature, we must rely more and more upon sympathetic selection, judicious editing, and the indexer who knows where to exercise discretion. Any simpleton can write a book, but it requires high skill to make an index."

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If a hundred or a thousand people, all of the same age, of the same constitution and habits, were suddenly seized by the same illness, and one half of them were to place themselves under the care of doctors, such as they are in our time, whilst the other half entrusted themselves to Nature and to their own discretion, I have not the slightest doubt that there would be more cases of death amongst the former, and more cases of recovery among the latter.

— Petrarch