„I have never met a man so ignorant that I could not learn something from him.“

„The wisest man I ever knew taught me something I never forgot. And although I never forgot it, I never quite memorized it either. So what I’m left with is the memory of having learned something very wise that I can’t quite remember.“

—  George Carlin American stand-up comedian 1937 - 2008

„When I was a boy of 14, my father was so ignorant, I could hardly stand to have the old man around. But when I got to be 21, I was astonished at how much the old man had learned in seven years.“

—  Mark Twain American author and humorist 1835 - 1910

Not found in Twain's works, this was attributed to him in Reader's Digest (September 1939): no prior attribution known. Mark Twain’s father died when Twain was eleven years old.
Disputed
Variant: When I was a boy of fourteen, my father was so ignorant I could hardly stand to have the old man around. But when I got to be twenty-one, I was astonished at how much the old man had learned in seven years.

„I learned I had to stand for something so I could stand to be me.“

—  Martin Sheen American actor 1940

2000s, Progressive magazine interview (2003)

„Every man is my superior in that I may learn from him.“

—  Thomas Carlyle Scottish philosopher, satirical writer, essayist, historian and teacher 1795 - 1881

„I never learned from a man who agreed with me.“

—  Robert A. Heinlein American science fiction author 1907 - 1988

„I have to stand up for myself… I learned something that I could and should stand up for myself, and he learned something, which was she will stand up for herself.“

—  Carly Fiorina American corporate executive and politician 1954

David Webb Show http://www.breitbart.com/big-government/2015/08/05/ohio-male-rnc-member-calls-carly-fiorina-hot-babe/ (5 August 2015).
2010s, 2015, David Webb Show (August 2015)

„I speak from ignorance.
Who once learned much, but speaks from ignorance now.“

—  Nathaniel Tarn American poet, essayist, anthropologist, and translator 1928

Poem Last of the Chiefs published in: Nathaniel Tarn (1965) Old savage, young city. p. 18.

„I've never had to go very far to learn everything I have learned. I just had to care about something & pay attention.“

—  David Allen American productivity consultant and author 1945

19 January 2010 https://twitter.com/gtdguy/status/7933461617
Official Twitter profile (@gtdguy) https://twitter.com/gtdguy

„I have never spent a day in my adult life where I didn't learn something“

—  Peter Jennings News anchor 1938 - 2005

Interview in Saturday Evening Post, quoted by USA Today http://www.usatoday.com/life/television/news/2005-08-07-jennings-dies_x.htm?POE=LIFISVA (7 August 2005)
Context: I have never spent a day in my adult life where I didn't learn something, and if there is a born-again quality to me, that's it.

„The ‘Romeo and Juliet’ story, we’re so past that. I have a very deep respect for art, but I also think we have a lot to learn from pop culture. And that is the future. Either you can ignore it and be stuck in the past, or you can learn from it.“

—  Danny Tidwell American dancer 1984

In response to critics and ballet fans who say Tidwell "sold-out" by auditioning on So You Think You Can Dance
La Rocco Claudia. "TV Viewers Discover Dance, and the Debate Is Joined" http://www.nytimes.com/2007/09/21/arts/dance/21revo.html?ref=dance#, The New York Times, September 21, 2007

„I tell Ryan that God gave him a brother like Miles so that Ryan could learn that anything is possible and that he can be good at anything. And I tell Miles that God gave him Ryan so that Miles could learn patience and persistence and how to overcome challeges.“

—  Nicholas Sparks American writer and novelist 1965

Nicholas Sparks, Chapter 17, p. 333
2000s, Three Weeks with My Brother (2004)

„Let each man say what he chooses; if because of this I am criticized by the ignorant, I shall not be chastised by the learned.“

—  Miguel de Cervantes Spanish novelist, poet, and playwright 1547 - 1616

Don Quixote de la Mancha (1605–1615), Unplaced as yet by chapter

„School, I never truly got the knack of. I could never focus on things I didn't want to learn.“

—  Leonardo DiCaprio American actor and film producer 1974

http://www.flixster.com/actor/leonardo-di-caprio/leonardo-dicaprio-quotes

„Every man of learning wishes, that his son may be learned; and that not so much from a view to pecuniary advantage, as from a desire to have him supplied with the means of useful instruction and liberal amusement.“

—  James Beattie Scottish poet, moralist and philosopher 1735 - 1803

"Remarks on the Utility of Classical Learning" (written in 1769), published in Essays, Vol. II (1776), p. 524.

„Myself not ignorant of woe,
Compassion I have learned to show.“

—  John Conington British classical scholar 1825 - 1869

Source: Translations, The Aeneid of Virgil (1866), Book I, p. 31

„Only with the Internet can a peasant I have never met hear my voice and I can learn what’s on his mind. A fairy tale has come true.“

—  Ai Weiwei Chinese concept artist 1957

2000-09, The Bold and the Beautiful, 2009

„Other sages have spoken to me of God. But from whom could I have learned the essence of Divine perfection, as from Him, who was in a peculiar sense the Son, representative, and image of God — who was especially an incarnation of the unbounded love of the Father? And from what other teacher could I have learned to approach the Supreme Being with that filial spirit, which forms the happiness of my fellowship with Him? From other seers I might have heard of heaven; but when I behold in Jesus the spirit of heaven, dwelling actually on earth, what a new comprehension have I of that better world!“

—  William Ellery Channing United States Unitarian clergyman 1780 - 1842

Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 62

„I have never learned to draw a hand well enough, so why should I stop trying now?“

—  Jack Levine American artist 1915 - 2010

Selden Rodman, Conversations With Artists, 1956.

„I am not successful and I probably never will be. I look around and I see successful people, and I see that they have something I don't—success. Perhaps they were born that way, or perhaps they figured something out that I can never seem to learn. I don't know. That's why I'm not successful.“

—  John S. Hall Poet, author, singer, lawyer 1960

December 12
Quotes from Daily Negations (2007)