Two signs of learned person are: acceptance of other people's criticism, and being knowledgeable about the angles and dimensions of rhetoric and debate.
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Ibn Shu’ba al-Harrani, Tuhaf al-'Uqul, p.252Husayn ibn Ali
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There are three signs of a knowledgeable person: knowledge, forbearance and silence.
Ali ibn Abi Talib
"They shocked the American people. They shocked us. They certainly shocked me. I wasn't sure what kind of president Obama was going to be. I thought, maybe this guy is going to be a centrist-his rhetoric was centrist. His upbringing and history didn't suggest he was centrist but his rhetoric did. So I was thinking, well, we'll see. And then-bam!-out of the gates, these people had a hardcore-left agenda. We, along with the American people, were spectators while they took this government very far left, very fast. But what became so unnerving to us and the American people is that they used our rhetoric. They used the rhetoric of freedom and choice and opportunity to sell an inherently statist agenda; to sell an agenda that was completely the opposite of its rhetoric. And people started to realize that they were trying to transform the country using the rhetoric of the Right to push the substance of the Left."
Paul Ryan
Associating with the wise and the knowledgeable people adds to the prestige of a person.
Ali ibn Abi Talib
Though we cannot SEE angles, we can INFER them, and this with great precision. Our sense of touch, stimulated by necessity, and developed by long training, enables us to distinguish angles far more accurately than your sense of sight, when unaided by a rule or measure of angles.
Edwin Abbot
When I speak of reason or rationalism, all I mean is the conviction that we can learn through criticism of our mistakes and errors, especially through criticism by others, and eventually also through self-criticism. A rationalist is simply someone for whom it is more important to learn than to be proved right; someone who is willing to learn from others — not by simply taking over another's opinions, but by gladly allowing others to criticize his ideas and by gladly criticizing the ideas of others. The emphasis here is on the idea of criticism or, to be more precise, critical discussion. The genuine rationalist does not think that he or anyone else is in possession of the truth; nor does he think that mere criticism as such helps us achieve new ideas. But he does think that, in the sphere of ideas, only critical discussion can help us sort the wheat from the chaff. He is well aware that acceptance or rejection of an idea is never a purely rational matter; but he thinks that only critical discussion can give us the maturity to see an idea from more and more sides and to make a correct judgement of it.
Karl Popper
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