“Those who know their minds do not know their hearts.”
Tous ceux qui connaissent leur esprit ne connaissent pas leur coeur.
Maxim 103.
Reflections; or Sentences and Moral Maxims (1665–1678)
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François de La Rochefoucauld156
French author of maxims and memoirs 1613–1680Related quotes
Samuel Butler (1835–1902) novelist
Scientists
The Note-Books of Samuel Butler (1912), Part XIV - Higgledy-Piggledy
“Those who know, do. Those that understand, teach.”
Aristotle (-384–-321 BC) Classical Greek philosopher, student of Plato and founder of Western philosophy
This and many similar quotes with the same general meaning are misattributed to Aristotle as a result of Twitter attribution decay. The original source of the quote remains anonymous. The oldest reference resides in the works of George Bernard Shaw, Man and Superman (1903): "Maxims for Revolutionists", where he claims that “He who can, does. He who cannot, teaches.”. However, the related quote, "Those who can, do. Those who understand, teach" likely originates from Lee Shulman in his explanation of Aristotlean views on professional mastery: Source: Shulman, L. S. (1986). Those who understand: Knowledge growth in teaching. Educational Researcher, 15(2), 4 - 14. Stable URL: http://www.jstor.org/stable/1175860
Misattributed
Variant: Those who can, do, those who cannot, teach.
“There is no light for those who do not know darkness.”
Takehiko Inoue (1967) Japanese artist
Source: Takehiko Inoue Quotes https://www.goodreads.com/author/quotes/147221.Takehiko_Inoue
Tite Kubo (1977) Japanese manga artist
Source: Bleach, Volume 20
“Those people who think they know everything are a great annoyance to those of us who do.”
Isaac Asimov (1920–1992) American writer and professor of biochemistry at Boston University, known for his works of science fiction …
As quoted in The Mammoth Book of Zingers, Quips, and One-Liners (2004) edited by Geoff Tibballs, p. 299
General sources
“Sentiment is for those who don't know what to do next.”
Nadine Gordimer (1923–2014) South african Nobel-winning writer
Rosa Burger in Burger's Daughter (1979), p. 130
“Those who do not know their history are doomed to keep stepping in it.”
Lois McMaster Bujold Vorkosigan Saga
This evokes the famous statement by George Santayana in The Life of Reason Vol. 1 (1905): "Those who cannot remember the past are condemned to repeat it."
Vorkosigan Saga, The Vor Game (1990)