“In conclusion, it appears to me that nothing can be more improving to a young naturalist, than a journey in distant countries. It both sharpens, and partly likewise allays that want and craving, which, as Sir J. Herschel remarks, a man experiences although every corporeal sense is fully satisfied. The excitement from the novelty of objects, and the chance of success, stimulate him to increased activity. Moreover as a number of isolated facts soon become uninteresting, the habit of comparison leads to generalization. On the other hand, as the traveller stays but a short space of time in each place, his descriptions must generally consist of mere sketches, instead of detailed observation. Hence arises, as I have found to my cost, a constant tendency to fill up the wide gaps of knowledge, by inaccurate and superficial hypotheses.”

— Charles Darwin, book The Voyage of the Beagle

Source: The Voyage of the Beagle (1839), chapter XXIII: "Mauritius To England", pages 607-608 http://darwin-online.org.uk/content/frameset?pageseq=626&itemID=F10.3&viewtype=image

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British naturalist, author of "On the origin of species, by… 1809–1882

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