“Qui plussait, plus se tait. French, you know. The more a man knows, the less he talks.”
Source: A Wrinkle in Time
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Madeleine L'Engle 223
American writer 1918–2007Related quotes

Se La, co-written with Greg Phillinganes.
Song lyrics, Dancing on the Ceiling (1986)

“A specialist is a man who knows more and more about less and less.”
Speech before a gathering of physicians (circa 1922) http://books.google.com/books?id=qYIHAAAAMAAJ&q=%22a+specialist+is+a+man+who+knows+more+and+more+about+less+and+less%22&pg=PA35#v=onepage

“Vast is the field of Science … the more a man knows, the more he will find he has to know.”
Vol. 1, letter 11.
Sir Charles Grandison (1753–1754)

“The more a man knows, the more he forgives.”
Widely attributed to Catherine II online, this has been attributed to Confucius in published books, but no print sources attribute this to Catherine.
Misattributed

Interview in Playboy (January 1965) https://web.archive.org/web/20080706183244/http://www.playboy.com/arts-entertainment/features/mlk/04.html
1960s
Context: I met Malcolm X once in Washington, but circumstances didn't enable me to talk with him for more than a minute. He is very articulate … but I totally disagree with many of his political and philosophical views — at least insofar as I understand where he now stands. I don't want to seem to sound self-righteous, or absolutist, or that I think I have the only truth, the only way. Maybe he does have some of the answer. I don't know how he feels now, but I know that I have often wished that he would talk less of violence, because violence is not going to solve our problem. And in his litany of articulating the despair of the Negro without offering any positive, creative alternative, I feel that Malcolm has done himself and our people a great disservice. Fiery, demagogic oratory in the black ghettos, urging Negroes to arm themselves and prepare to engage in violence, as he has done, can reap nothing but grief.

“The more man learned, the more he realized he did not know.”
Source: The Lost Symbol