The war of ideas is a Greek invention. It is one of the most important inventions ever made. Indeed, the possibility of fighting with with words and ideas instead of fighting with swords is the very basis of our civilization, and especially of all its legal and parliamentary institutions.
Interpretation
Ideas and dialogue are more powerful than violence in shaping civilization.
In this quote, Karl Popper emphasizes the significance of the 'war of ideas' as a foundational aspect of civilization. He suggests that the ability to engage in intellectual discourse and debate, rather than resorting to violence, is what has allowed societies to develop legal structures and democratic institutions, ultimately fostering a more civilized world.
In practice
In a speech on democracy, one might use this quote to advocate for peaceful discourse.
The growth of our knowledge is the result of a process closely resembling what Darwin called 'natural selection'; that is, the natural selection of hypotheses: our knowledge consists, at every moment, of those hypotheses which have shown their (comparative) fitness by surviving so far in their struggle for existence, a competitive struggle which eliminates those hypotheses which are unfit.
If you can't say it simply and clearly, keep quiet, and keep working on it till you can.
No particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
The belief in a political Utopia is especially dangerous. This is possibly connected with the fact that the search for a better world, like the investigation of our environment, is (if I am correct) one of the oldest and most important of all the instincts.
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
Thus science must begin with myths, and with the criticism of myths; neither with the collection of observations, nor with the invention of experiments, but with the critical discussion of myths, and of magical techniques and practices.
Sometimes I believe that this less material life is our truer life, and that our vain presence on the terraqueous globe is itself the secondary or merely virtual phenomenon.
I don't know about Heaven or Hell, but I do know that we are visited all the time by the spirits of those who affected us in life.
And in that fraction of a second before anything actually happened, Santino Corleone knew he was a dead man.
Every myth is psychologically symbolic. Its narratives and images are to be read, therefore, not literally, but as metaphors.
Like almost everyone else in America, I grew up believing the myth of the objective scientist. Fortunately I was raised on the edges of two very distinct cultures, western European and American Indian.
I know that, as night and shadows are good for flowers, and moonlight and dews are better than a continual sun, so is Christ's absence of special use, and that it hath some nourishing virtue in it, and giveth sap to humility, and putteth an edge on hunger, and funisheth a fairfield to faith to put forth itself, and to exercise its fingers in gripping it seeth not what.
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