"Uncertainty" is NOT "I don't know." It is "I can't know." "I am uncertain" does not mean "I could be certain."
Interpretation
Uncertainty implies a limitation in knowledge rather than just a lack of knowledge.
Heisenberg's quote emphasizes the profound nature of uncertainty in knowledge and existence. Unlike mere ignorance, which denotes a possibility of knowing, uncertainty signifies an inherent limitation in our ability to understand or predict certain aspects of reality, highlighting that some things are fundamentally beyond our grasp.
In practice
In a classroom discussion about the nature of knowledge.
Although the theory of relativity makes the greatest of demands on the ability for abstract thought, still it fulfills the traditional requirements of science insofar as it permits a division of the world into subject and object (observer and observed) and, hence, a clear formulation of the law of causality.
It was about three o'clock at night when the final result of the calculation [which gave birth to quantum mechanics] lay before me ... At first I was deeply shaken ... I was so excited that I could not think of sleep. So I left the house ... and awaited the sunrise on top of a rock.
It is generally believed that our science is empirical and that we draw our concepts and our mathematical constructs from the empirical data. If this were the whole truth, we should, when entering into a new field, introduce only such quantities as can directly be observed, and formulate natural laws only by means of these quantities.
When I meet God, I am going to ask him two questions: Why relativity ? And why turbulence ? I really believe he will have an answer for the first.
The end of the First World War had thrown Germany's youth into great turmoil. The reins of power had fallen from the hands of a deeply disillusioned older generation, and the younger ones drew together in larger and smaller groups to blaze new paths or, at least, to discover a new star to steer by.
The Same organizing forces that have shaped nature in all her forms are also responsible for the structure of our minds.
The threat of China is not military. The threat of China is they can't be intimidated. Europe you can intimidate. When the US tries to get people to stop investing in Iran, European companies pull out, China disregards it. You look at history and understand why - they've been around for 4,000 years, they have contempt for the barbarians, they just don't give a damn.
There is a perverse mood of the mind which is rather soothed than irritated by misconstruction; and in quarters where we can never be rightly known, we take pleasure, I think, in being consummately ignored. What honest man on being casually taken for a housebreaker does not feel rather tickled than vexed at the mistake?
Religion, art, and science flourish best in a free society. True, freedom does not afford much opportunity for grand gestures. It has little room for martyrs. But life is not supposed to be about dying well. It is about living well.
Many who seem to be struggling with adversity are happy; many, amid great affluence, are utterly miserable.
Probably the only place where a man can feel really secure is in a maximum security prison, except for the imminent threat of release.
Memory offers up its gifts only when jogged by something in the present. It isn't a storehouse of fixed images and words, but a dynamic associative network in the brain that is never quiet and is subject to revision each time we retrieve an old picture or old words.
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