Thomas Jefferson, Letter (24 Mar 1824) to Mr. Woodward. Collected in The Writings of Thomas Jefferson: Correspondence (1854), 339.
Posthumous publications, On botany
“A geologist should be well versed in chemistry, natural philosophy, mineralogy, zoology, comparative anatomy, botany; in short, in every science relating to organic and inorganic nature. …But the brief duration of human life, and our limited powers, are so far from permitting us to aspire to such extensive acquisitions, that excellence even in one department is within the reach of few, and those individuals most effectually promote the general progress, who concentrate their thoughts on a limited portion of the field of inquiry.”
Chpt.1, p. 3
Principles of Geology (1832), Vol. 1
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Charles Lyell 103
British lawyer and geologist 1797–1875Related quotes
Source: Reforming Education: The Opening of the American Mind (1990), p. 316
Source: "The Failure of Business Leadership and the Responsibility of the Universities", 1933, p. 423; as cited in: Wallace Donham http://www.eoht.info/page/Wallace+Donham at Hmolpedia, 2015
From "Order and Disorder in Nature", 1958 Proceedings of the Geologists' Association, 69, 2, 77-82.
The Ethic of Freethought (Mar 6, 1883)
Introduction, p. xiii
Philosophy At The Limit (1990)
Source: Emotional amoral egoism (2008), p.204
As quoted in Schrödinger: Life and Thought (1989) by Walter Moore