The ontology of materialism rested upon the illusion that the kind of existence, the direct "actuality" of the world around us, can be extrapolated into the atomic range. This extrapolation is impossible, however.

The incomplete knowledge of a system must be an essential part of every formulation in quantum theory. Quantum theoretical laws must be of a statistical kind. To give an example: we know that the radium atom emits alpha-radiation. Quantum theory can give us an indication of the probability that the alpha-particle will leave the nucleus in unit time, but it cannot predict at what precise point in time the emission will occur, for this is uncertain in principle.

...separation of the observer from the phenomenon to be observed is no longer possible.

The more closely you look at one thing, the less closely can you see something else.

There are things that are so serious that you can only joke about them.

I think that the discovery of antimatter was perhaps the biggest jump of all the big jumps in physics in our century.

Nature allows only experimental situations to occur which can be described within the framework of the formalism of quantum mechanics