The One Who Insists On Never Uttering

Modern Physics Has Changed Nothing In The Great Classical Disciplines Of, For Instance, Mechanics, Optics, And Heat. Only The Conception Of Hitherto Unexplored Regions, Formed Prematurely From A Knowledge Of Only Certain Parts Of The World, Has Undergone A Decisive Transformation. This Conception, However, Is Always Decisive For The Future Course Of Research.

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.

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

The Conception Of Objective Reality ... Has Thus Evaporated ... Into The Transparent Clarity Of Mathematics That Represents No Longer The Behavior Of Particles But Rather Our Knowledge Of This Behavior.

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.