“Let us be thankful for the fools. But for them the rest of us could not succeed.”
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Mark Twain 637
American author and humorist 1835–1910Related quotes

“It is hardly possible God will let us succeed while such enormities are practiced.”
Regarding slavery (1862), as quoted in Garfield: A Biography (1978), by Allan Peskin, p. 145
1860s
Context: We do not even inquire whether a black man is a rebel in arms, or not, if he is black, be he friend or foe, he is thought best kept at a distance. It is hardly possible God will let us succeed while such enormities are practiced.

“If we fail, let us try again and again until we succeed.”
As a response to Prime Minister Gladstone's criticism of Chamberlain's "Radical Programme," from a Speech at Warrington, cited in "Great Issues in Western Civilization, Volume II" (Donald Kagan, 1992), pg. 419.
1880s

2010-, Ai Weiwei Says Blind Dissident’s Escape Will Inspire Chinese, 2012
“Only fools think they’re wise; the rest of us just muddle through as we can.”
“Where Desert Spirits Crowd the Night”, p. 264
The Ivory and the Horn (1996)

Book VIII, Chapter 4.
Books, Coningsby (1844), Vivian Grey (1826)