“You should never be ashamed to admit you have been wrong. It only proves you are wiser today than yesterday”
Alexander Pope, Thoughts on Various Subjects (1727), Published in Swift's Miscellanies (1727)
Misattributed
Variant: A man should never be ashamed to own he has been in the wrong, which is but saying in other words, that he is wiser today than he was yesterday.
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Jonathan Swift 141
Anglo-Irish satirist, essayist, and poet 1667–1745Related quotes

Book Sometimes you win Sometimes you Learn

“I do not think much of a man who is not wiser today than he was yesterday.”
Included in Portrait-Life of Lincoln (1910) by Francis T Miller
Posthumous attributions

“Never regret yesterday. Life is in you today, and you make your tomorrow.”
The Creation Of Human Ability (1954).

“If you want to understand today, you have to search yesterday.”

Massachusetts v. United States, 333 U.S. 611, 639-40 (1948) (dissenting)
Judicial opinions

“If what you have done yesterday still looks big to you, you haven't done much today.”
101 Best Ways to Get Ahead: Solid Gold Advice from 101 of the World's Most Successful People (2004) by Michael E. Angier and Sarah Pond, p. 30
1990s