The Austrian physicist Wolfgang Pauli (1900-1958) was often called the conscience of physics. He was famous for his sharp and critical mind which made him a central figure among the founders of quantum physics. He also was an outstanding philosopher, especially interested in finding a new conception of reality and of causality. A careful study of the original sources of the past culminated in his study of Kepler and of medieval symbolism, a concept that played a central role in his discussion with Carl Jung on what they called the psycho-physical problem. Pauli considered the sharp...

The Copenhagen interpretation of quantum mechanics has established the language that is generally used when quantum mechanics is applied. In Parts I and II and in the first chapter of Part III, the author describes the main features in the philosophy behind the Copenhagen interpretation. What then follows are his personal views on the basis of this "Copenhagen philosophy." Although Pauli has been the author's most important guide, the reader should understand that he only gives a personal interpretation of what Pauli's philosophy implies in these important questions.