"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.
There was a time when the reader of an unexciting newspaper would remark, 'How dull is the world today!' Nowadays he says, 'What a dull newspaper!'
Ever since then I have believed that God is not only a gentleman and a sport; he is a Kentuckian too.
Thus it happens in matters of state; for knowing afar off (which it is only given a prudent man to do) the evils that are brewing, they are easily cured. But when, for want of such knowledge, they are allowed to grow so that everyone can recognize them, there is no longer any remedy to be found.
The cause is hidden; the effect is visible to all.
Man's salvation and perfection consists of doing the will of God which he must have in view in all things, and at every moment of his life.
We are empty shells if we do not possess, if we do not fill our life with furniture, with music, with knowledge, with this or that. And that shell makes a lot of noise, and that noise we call living, and with that we are satisfied.
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