"Resistance to the organized mass can be effected only by the man who is as well organized in his individuality as the mass itself." -Carl Jung If you divide the matter we know into progressively smaller and smaller components, you’d find that atomic nuclei, made of protons and neutrons, compose the overwhelming majority of the mass we understand. But if you look inside each nucleon, you find that its constituents -- quarks and gluons -- account for less than 0.2% of their total mass.