Fundamental Forces Guiding Fermions and Bosons
Quarks and Leptons - Elementary Particles of Physical Matter
“All our experiment indicate that quarks interact as points with no spatial dimensions, and so are fundamental, like leptons. If the fundamental particles really are dimensionless points with mass, flavor, color, charge and other quantum properties, occupying no volume, then the nature of matter appears quite bizarre. The four interactions give matter shape; matter itself is empty! If all four interactions really are unified, and the particles themselves are just points of interaction for the force, the phrase from the Star Wars movies, `May the Force be with you’ might really be appropriate.”
– Quarks to the Cosmos – Lederman & Schramm