"Of all insults, the temporary condescension of a master to a slave is the most outrageous and galling. That potentate who most condescends, mark him well; for that potentate, if occasion come, will prove your uttermost tyrant."

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Wallace's sales agent, back in London, heard mutterings from some naturalists that young Mr. Wallace ought to quit theorizing and stick to gathering facts. Besides expressing their condescension toward him in particular, that criticism also reflected a common attitude that fact-gathering, not theory, was the proper business of all naturalists.

— David Quammen