“Any man can make mistakes, but only an idiot persists in his error”
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Marcus Tullius Cicero 180
Roman philosopher and statesman -106–-43 BCRelated quotes

“No man's error becomes his own Law; nor obliges him to persist in it.”
The Second Part, Chapter 26, p. 144
Leviathan (1651)

Source: Iorich (2010), p. 172 <!-- (goodreads) http://www.goodreads.com/work/quotes/6874180 -->
Context: A stupid person can make only certain, limited types of errors; the mistakes open to a clever fellow are far broader. But to the one who knows how smart he is compared to everyone else, the possibilities for true idiocy are boundless.

Source: Website of Mehr News Agency, 2017 http://www.mehrnews.com/news/3954046/%D9%BE%D8%B0%DB%8C%D8%B1%D8%B4-%D8%AE%D8%B7%D8%A7-%D8%AF%D8%B1-%D8%AA%D8%B1%D8%A8%DB%8C%D8%AA-%D8%A7%D9%86%D8%B3%D8%A7%D9%86-%D8%B6%D8%B1%D9%88%D8%B1%DB%8C-%D8%A7%D8%B3%D8%AA

“A mistake is only an error, it becomes a mistake when you fail to correct it”
Source: The Writings of John Lennon

“The idiot is indeed the good man, but only because he doesn't know any better.”
Sons Come and Go, Mothers Hang in Forever (1976)

“The only man who makes no mistakes is the man who never does anything.”
As quoted by Jacob A. Riis in Theodore Roosevelt, the Citizen (1904), chapter XVI A Young Men's Hero http://www.bartleby.com/206/16.html
1900s

"The Testament of a Furniture Dealer" http://www.ikea.com/ms/en_US/pdf/reports-downloads/the-testament-of-a-furniture-dealer.pdf (1976).