"The love for all living creatures is the most noble attribute of man."
"Each organic being is striving to increase in a geometrical ratio . . . each at some period of its life, during some season of the year, during each generation or at intervals, has to struggle for life and to suffer great destruction . . . The vigorous, the healthy, and the happy survive and multiply."
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Source: Charles Darwin (2012). “The Origin of Species and The Voyage of the 'Beagle': Introduction by Richard Dawkins”, p.599, Everyman's Library
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