“The mind petrifies if a circle be drawn around it, and it can hardly be denied that dogma draws a circle round the mind.”
Hail and Farewell (1912), vol. 2: Salve, Kessinger Publishing, 2005, ISBN 1-417-93272-4, ch. XV (p. 36).
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George Moore (novelist) 33
Irish novelist, short-story writer, poet, art critic, memoi… 1852–1933Related quotes

Source: Black Elk Speaks (1961), Ch. 17 : The First Cure
Context: Everything an Indian does is in a circle, and that is because the power of the world always works in circles, and everything tries to be round. In the old days when we were a strong and happy people, all our power came to us from the sacred hoop of the nation, and so long as the hoop was unbroken the people flourished.

“Circles, like the soul, are neverending and turn round and round without a stop”
This adage had previously appeared, identically worded, in Coleridge's The Statesman's Manual (1816)
1840s, Essays: First Series (1841), Circles

“Through a vicious circle of pure reason skepsis itself becomes dogma.”
Briefwechsel, ed. Arthur Henkel (1955-1975), vol. V, p. 432.

“A circle is a round straight line with a hole in the middle.”
Quoting a schoolchild in "English as She Is Taught"