“The monkeys themselves, without instruction from any quarter, learn to use sticks in fighting, and some build houses—an act which cannot in their case be considered as one of instinct, but of intelligence.”
Source: Vestiges of the Natural History of Creation (1844), p. 320
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Robert Chambers (publisher, born 1802) 100
Scottish publisher and writer 1802–1871Related quotes

To keep silently in mind what one has seen and heard, to study hard and never feel contented, to teach others tirelessly; have I done (all of) these things?
Source: The Analects, Other chapters

Other remarks
Source: Adolf Hitler as in a speech the summer before the Degenerate Art Exhibition as quoted without citation in " Degenerate art: Why Hitler hated modernism http://www.bbc.com/news/magazine-24819441" by Lucy Burns, BBC.

1870s, Self-Made Men (1872)

The Friend, No. 14
Bartlett's Familiar Quotations, 10th ed. (1919)
Evolution of living organisms: evidence for a new theory of transformation (1977)

Source: The Emergence Of Probability, 1975, Chapter 15, Inductive Logic, p. 139.

Source: Women have a very important role in the Christian Community http://www.archivioradiovaticana.va/storico/2014/08/08/women_have_a_very_important_role_in_the_christian_community_/en-1104194 (August 2014)