Werner Heisenberg

The Copenhagen interpretation of quantum theory starts from a paradox.

The transition from the 'possible' to the 'actual' takes place during the act of observation.

The laws of quantum theory are of a statistical character.

The probability function does not allow a description of what happens between two observations.

The atomic physicist has to concede that his science is only a link in the endless chain of discussions between man and nature, and that it cannot talk about nature 'as such'.

The old is contained in the new, but it is reinterpreted and seen in a new light.