I am opposed to looking upon logic as a kind of game. ... One might think that it is a matter of choice or convention which logic one adopts. I disagree with this view.
Interpretation
Logic is not merely a game or a matter of personal choice; it holds an objective truth.
In this quote, Karl Popper emphasizes the importance of logic as a fundamental aspect of rational thought, suggesting that it should not be treated as arbitrary or optional. He argues against the idea that individuals can simply choose their logical framework, asserting that logic has a more profound and objective basis that must be respected in philosophical and scientific discussions.
In practice
When discussing the foundations of science, you could use this quote to highlight the importance of objective reasoning.
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.
The rash assertion that "God made man in His own image" is ticking like a time bomb at the foundation of many faiths.
Meditation is such a more substantial reality than what we normally take to be reality.
If we never arrived anywhere, it did not matter. Between that earth and that sky i felt erased, blotted out. I did not say my prayers that night: here, i felt what would be would be.
In order to exercise the right to freedom of speech conferred by the Constitution, one should fulfill the social responsibility of a Chinese citizen.
Once you attempt legislation upon religious grounds, you open the way for every kind of intolerance and religious persecution.
The only way we can be of use to God is to let Him take us through the crooks and crannies of our own characters.
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