Only A Few Know, How Much One

It Will Never Be Possible By Pure Reason To Arrive At Some Absolute Truth.

The Exact Sciences Also Start From The Assumption That In The End It Will Always Be Possible To Understand Nature, Even In Every New Field Of Experience, But That We May Make No A Priori Assumptions About The Meaning Of The Word Understand.

It Seems Sensible To Discard All Hope Of Observing Hitherto Unobservable Quantities, Such As The Position And Period Of The Electron... Instead It Seems More Reasonable To Try To Establish A Theoretical Quantum Mechanics, Analogous To Classical Mechanics, But In Which Only Relations Between Observable Quantities Occur.

Both Matter And Radiation Possess A Remarkable Duality Of Character, As They Sometimes Exhibit The Properties Of Waves, At Other Times Those Of Particles. Now It Is Obvious That A Thing Cannot Be A Form Of Wave Motion And Composed Of Particles At The Same Time - The Two Concepts Are Too Different

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?