Even For The Physicist The Description In

The Very Act Of Observing Disturbs The System.

Can Quantum Mechanics Represent The Fact That An Electron Finds Itself Approximately In A Given Place And That It Moves Approximately With A Given Velocity, And Can We Make These Approximations So Close That They Do Not Cause Experimental Difficulties?

The Discontinuous 'reduction Of The Wave Packets' Which Cannot Be Derived From Schroedinger's Equation Is ... A Consequence Of The Transition From The Possible To The Actual.

Quantum Theory Provides Us With A Striking Illustration Of The Fact That We Can Fully Understand A Connection Though We Can Only Speak Of It In Images And Parables.

Every Word Or Concept, Clear As It May Seem To Be, Has Only A Limited Range Of Applicability.