Source: Natural Right and History (1953), p. 6
“While we maintain the unity of the human species, we at the same time repel the depressing assumption of superior and inferior races of men. There are nations more susceptible of cultivation, more highly civilized, more enobled by mental cultivation than others, but none in themselves nobler than others.”
Kosmos (1845 - 1847)
Context: While we maintain the unity of the human species, we at the same time repel the depressing assumption of superior and inferior races of men. There are nations more susceptible of cultivation, more highly civilized, more enobled by mental cultivation than others, but none in themselves nobler than others. All are in like degree designed for freedom; a freedom which, in the ruder conditions of society, belongs only to the individual, but which, in social states enjoying political institutions, appertains as a right to the whole body of the community.
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Alexander von Humboldt 11
Prussian geographer, naturalist and explorer 1769–1859Related quotes

Source: The Geological Evidences of the Antiquity of Man (1863), Ch.21, p. 415
Context: We may understand why the species of the same genus, or genera of the same family, resemble each other more nearly in their embryonic than in their more fully developed state, or how it is that in the eyes of most naturalists the structure of the embryo is even more important in classification than that of the adult, 'for the embryo is the animal in its less modified state, and in so far it reveals the structure of its progenitor. In two groups of animals, however much they may at present differ from each other in structure and habits, if they pass through the same or similar embryonic stages, we may feel assured that they have both descended from the same or nearly similar parents, and are therefore in that degree closely related. Thus community in embryonic structure reveals community of descent, however much the structure of the adult may have been modified.

“The heart should be cultivated with more assiduity than the head.”

1790s, Farewell Address (1796)
Source: The Papers Of George Washington
Context: Nothing is more essential, than that permanent, inveterate antipathies against particular Nations, and passionate attachments for others, should be excluded; and that, in place of them, just and amicable feelings towards all should be cultivated. The Nation, which indulges towards another an habitual hatred, or an habitual fondness, is in some degree a slave. It is a slave to its animosity or to its affection, either of which is sufficient to lead it astray from its duty and its interest. Antipathy in one nation against another disposes each more readily to offer insult and injury, to lay hold of slight causes of umbrage, and to be haughty and intractable, when accidental or trifling occasions of dispute occur. Hence frequent collisions, obstinate, envenomed, and bloody contests.

The Railroad Trainman (November 1909)

Letter to Barrett Wendell (19 July 1919)

Speech to the Sheldonian Theatre in Oxford (27 February 1940), quoted in The Times (28 February 1940), p. 10
Foreign Secretary