This page is not yet completed. In the fullness of time I hope to add some discussion of the following topics

• About the complementary nature of the description of the world as composed of fields and particles. A word on modern field theories.
• A word on the "fundamental nature" of quantum and classical descriptions: The colour analogy using teh ideas of how a colour picture is composed of dots, but appears white.
• A word on the concept of "spin". This text was removed from the main text.
• Notes on the unusual effects in liquid helium caused by its bosonic nature