“Intolerance is the besetting sin of moral fervour.”
Source: 1930s, Adventures of Ideas (1933), p. 63, Ch. 4 http://books.google.com/books?id=UZeJuLvNq80C&q="Intolerance+is+the+besetting+sin+of+moral+fervour"&pg=PA50#v=onepage
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Alfred North Whitehead 112
English mathematician and philosopher 1861–1947Related quotes

The Rubaiyat (1120)

“politics without morality is close to sin”
Verbatim Remarks by H.E. Hamid Karzai, President of the Islamic Republic of Afghanistan at Osmania University, Hyderabad, India. http://afghanembassy.ca/public-affairs-afghanistan-embassy-canada-ottawa/speeches-afghanistan-embassy-canada-ottawa/content-folder/2006/articles/April-2006.html(April 2006)
2006

The Tragic Sense of Life (1913), IV : The Essence of Catholicism

“No elaboration of physical or moral accomplishment can atone for the sin of parasitism.”
#116
1900s, Maxims for Revolutionists (1903)