‘What we observe is not Nature in itself’ cautioned Werner Heisenberg, ‘but Nature exposed to our method of questioning’..
Elsewhere Heisenberg notes:
‘Although the Theory of Relativity makes the greatest demands on the ability of abstract thought, still it permits the traditional requirement of Science, as it permits a division of the world into Subject and Object and hence a clear formulation of the Laws of Causality.
This is the very point at which the difficulties of the Quantum Theory begin’.
Or in the phrasing of Neils Bohr [Nobel, Physics, 1922]: ‘Physics is not about how the World is, it is about what we can say about the World…Anyone who is not shocked by Quantum Theory has not understood it’.